The battle against lust is one of the oldest and most universal in the Christian life. The desert Fathers ranked it among the eight evil thoughts — Evagrius Ponticus places porneia (the thought of fornication) in second position, just after gluttony[1] — and tradition made it one of the seven capital sins: "pride, avarice, envy, wrath, lust, gluttony, and sloth or acedia"[2]. Saint John Cassian made it the second combat, after gluttony[3]. And the vigilance it demands lasts as long as life itself: self-mastery "is a long and exacting work" and "presupposes renewed effort at all stages of life"[4]. No one, then, is exempt from it, and no one wages it perfectly at the first attempt.
Of all spiritual battles, it is also one of the most poorly discerned. The subject is burning, laden with shame, silence, and approximate psychology; and errors cascade. Sometimes a grave fault is imputed to a mere movement of sensibility or an unconsented temptation; sometimes, on the contrary, a vice that ravages entire souls is trivialized, reduced to "a weakness of no gravity." Above all, the strategy is mistaken: it is believed that temptation must be "faced" to be conquered, whereas this battle is won by fleeing.
"Shun immorality. Every other sin which a man commits is outside the body; but the immoral man sins against his own body. […] Do you not know that your body is a temple of the Holy Spirit within you, which you have from God? You are not your own." — First Letter to the Corinthians 6:18-19[5]
This article reviews the most frequent misunderstandings about the battle against lust, grouped according to whether they concern its nature, discernment (what lust is not), the battle itself and its strategy, or the fault, the fall, and its duration. For each, it states the error in its common formulation, shows why it is attractive, why it is false, and then recalls what the Church and the saints truly teach.
It is neither a practical guide nor a florilegium: for the detailed nature of lust, the mechanism of temptation, custody of the senses, and the concrete means of combat, see How to Grow in the Battle Against Lust; for the proper voice of the Fathers, doctors, and mystics, see What the Saints Say About the Battle Against Lust. The positive virtue opposed to lust, chastity, and the interior limpidity that is purity of heart, each have their own dossier: How to Grow in Chastity, Common Errors About Chastity, and Common Errors About Purity of Heart. Here, as in the twin articles on acedia and on anger, the ground is cleared: false trails are recognized first, so that the true battle can then be waged.
Why Is the Battle Against Lust So Poorly Understood?
Concupiscence Is Not Sin
The first misunderstanding, from which almost all the others derive, is the confusion of concupiscence with sin. After Baptism, which erases every fault, there remains in man a disordered inclination of sensibility — a seat of desires that no longer spontaneously follow reason. The Council of Trent defined it with precision: this concupiscence comes from sin and inclines to sin, but the Church never understood it to be "truly and properly sin" in the baptized; it is "left for the battle" (ad agonem relicta)[6].
Saint Paul described this experience once and for all:
"For I delight in the law of God, in my inmost self, but I see in my members another law at war with the law of my mind and making me captive to the law of sin which dwells in my members." — Letter to the Romans 7:22-23[7]
Feeling desire rise, experiencing the turmoil of the flesh, is therefore not yet sinning: it is bearing the wound common to all the sons of Adam, "left for our battles." The Catechism repeats it: concupiscence "cannot harm those who do not consent but manfully resist it by the grace of Jesus Christ. Indeed, 'he who struggles according to the rules will be crowned' (2 Tim 2:5)"[8]. Missing this distinction is the mother error: it produces, on one side, the scrupulosity of those who believe themselves guilty for being tempted, and on the other, the discouragement of those who take the persistence of desire for proof of their damnation. Yet the persistence of desire is the condition of the battle, not its failure. The "lust of the flesh" is moreover one of the three great lusts Saint John opposes to the love of the Father[9] — it is not a particular shame, but the common lot of every Christian's combat.
A Battle Believed Lost in Advance — or Reserved for "the Obsessed"
A second misunderstanding, with two faces. The first: "this battle is impossible, nature is too strong, better to give up." The second, symmetrical: "this battle concerns only the obsessed, the deviant; being normal, I have nothing to do with it." Both errors converge: they dispense from fighting, one through defeatism, the other through false tranquility.
But tradition says exactly the opposite. On the one hand, no one is exempt: concupiscence is universal, and Christ placed the battle for purity at the very heart of the gaze, hence in everyone's life (Mt 5:28). On the other hand, no one is condemned in advance: chastity "has laws of growth which progress through stages marked by imperfection and often by sin"[10]; it is "a moral virtue" and also "a gift from God, a grace"[11]. The battle is neither a fatality reserved for a few sick souls nor a lost cause: it is the ordinary condition of the baptized, "left for the battle" and destined for the victory of grace.
Errors About the Nature of Lust
"Every Sexual Desire Is Lust"
This is the error of scrupulous souls, but also the residue of a certain rigorism: as soon as an attraction appears, it is baptized "lust," and one comes to believe that sexuality itself, desire, and pleasure would be evil. The error is attractive because it wears the appearances of delicacy — wanting never to sin — and because Christ's word on the gaze seems to confirm it:
"Every one who looks at a woman lustfully has already committed adultery with her in his heart." — Gospel According to Saint Matthew 5:28[12]
But the Church does not condemn desire: it condemns its disorder. The Catechism defines lust with care: "Lust is disordered desire for or inordinate enjoyment of sexual pleasure. Sexual pleasure is morally disordered when it is sought for itself, isolated from its procreative and unitive purposes"[13]. Everything lies in the words disordered and isolated: it is not pleasure that is evil, but pleasure torn away from love and self-gift. Sexual desire, willed by God, is good in itself; lust is its deformation, not its substance. As for the word on the gaze, Saint John Paul II commented on it at length in his catecheses on human love: Christ aims there at the "lust" that reduces the other to an object of enjoyment, not spontaneous attraction or emotion — and He announces the "redemption of the heart," that is, the possibility of looking with a purified heart[14]. Confusing attraction with lust tortures innocent consciences and, paradoxically, despises a gift of God under the pretext of respecting it.
"It Is Only a Weakness, of No Gravity"
This is the inverse error, and the most widespread in the surrounding culture: lust would be a "small weakness," a private and benign affair, "what does the least harm since no one is injured." It is ranked among peccadilloes, smiled at, accommodated. The error is attractive because it removes guilt and espouses the spirit of the age, which has made pleasure a right.
But reducing lust to a harmless weakness misses precisely what makes it a capital vice. Saint Thomas explains why it is so called: because the carnal pleasure at which it aims is one of the most vehement, man commits, to obtain it, "many sins" which proceed from it as from their principle[15]. Taking up Saint Gregory the Great, he enumerates its eight "daughters": on the side of the intellect, blindness of mind, thoughtlessness (inconsideratio), rashness (precipitatio), inconstancy; on the side of the will, disordered self-love, hatred of God, attachment to the present age, and despair of the age to come[16]. A vice that blinds the mind and begets even despair is no peccadillo. Nor does the Church treat these disorders as trifles: pornography, for instance — which "immerses all who are involved in the illusion of a fantasy world" — "is a grave offense"[17]. The gravity proper to sins of the flesh is not that they would be the worst in themselves — pride takes precedence — but that they lose the greatest number of souls: this is the warning reported from Fatima[18]. That they are also the most widespread accounts, humanly, for that great number. Trivializing lust is blinding oneself to the long posterity it leaves behind.
"My Body Concerns Only Me"
A third error, offspring of the preceding one: since the act would be victimless, it would concern only me; "it is my body, I do with it what I want." The body is treated as private and neutral property, an instrument of pleasure with no spiritual scope. The error is attractive because it flatters modern autonomy and seems to harm no one.
But Saint Paul ruined this logic in advance: "the immoral man sins against his own body. […] Do you not know that your body is a temple of the Holy Spirit within you, which you have from God? You are not your own"[19]. The body is not a neutral envelope: it is inhabited, sanctified, promised to the resurrection. That is why lust is never a purely private affair: it profanes a temple. And that is why, at the exact opposite of the Manichaeism that despises the body, the Church honors it to the point of grounding on its very dignity the gravity of the sin that profanes it. Modesty — "an integral part of temperance" — is not hatred of the body but respect for its mystery[20]. Saying "my body concerns only me" is ignoring to whom this body belongs.
Errors of Discernment: What Lust Is Not
Confusing Temptation with Sin
The most frequent error of discernment, and the most destructive, confuses temptation with fault. One is assailed by an image, a desire, a turmoil; at once one believes oneself guilty, as if the mere presence of temptation were already a sin. The scrupulous lose peace over it; and many abandon the battle, telling themselves: "since I am tempted, I am already lost."
Yet temptation, in itself, is not a sin — it is even the matter of merit. Christ Himself was tempted:
"For we have not a high priest who is unable to sympathize with our weaknesses, but one who in every respect has been tempted as we are, yet without sin." — Letter to the Hebrews 4:15[21]
If He was tempted without sinning, it is because temptation and sin are two distinct realities: the first comes to us from without or from concupiscence; the second begins only when the will consents. Feeling the fire is not yielding to it. Saint Paul teaches this for the whole spiritual battle: "the desires of the flesh are against the Spirit […]" — but this opposition is precisely the place of the struggle, not its defeat[22]. Confusing temptation with fault condemns one either to the scrupulosity that despairs or to the abandonment that resigns. On the precise mechanism of temptation — suggestion, delectation, consent — see How to Grow in the Battle Against Lust.
Confusing the First Movement with Consent
A subtler variant: between the first movement — that involuntary delectation which surges before any choice — and the consent where the fault is decided, the boundary is placed in the wrong spot. Either one believes oneself guilty from the first turmoil; or, conversely, a consent already given is excused by disguising it as "a reaction I did not choose."
The ascetical tradition distinguishes four moments here: suggestion (the thought that presents itself), the first movement (the involuntary emotion it awakens), lingering delectation, and consent (the will saying yes)[23]. The first movement largely escapes the will: it is neither virtue nor vice. The fault begins when one lingers voluntarily in delectation — the delectatio morosa of the Fathers, the pleasure at which reason stops with complacency instead of repressing it: it is already imputable, while remaining distinct from the full consent by which the will decides to pass to the act. The whole battle is fought in this in-between: cutting short from the suggestion, not feeding delectation, refusing consent. Confusing the first movement with the fault leads to scrupulosity; confusing consent with a mere reflex leads to false excuse. The distinction is no scholastic refinement: it decides the peace of the soul.
Confusing the Wound with Personal Fault
A third confusion, deeper: taking the persistence of concupiscence for a personal fault. "If I am still tempted after years of struggle, it is because I have not truly changed, because my conversion is false." The quality of one's soul is judged by the intensity of the battle, as if the saint were one who feels nothing anymore.
But concupiscence is a wound, not a fault: it can remain in the most advanced, sometimes to the end. Saint Paul himself, caught up to the third heaven, confesses to keeping a "thorn in the flesh" from which the Lord does not deliver him — the text does not say it is carnal concupiscence: it only shows that weakness remains even at the summit, and that grace suffices there[24]. The Council of Trent settled it: persistent concupiscence is not "truly and properly sin"; it is "left for the battle"[25]. Perfect purity — where the flesh itself is pacified even in sleep — is a term, a gift of God crowning the battle, not its starting point[26]. Judging holiness by the absence of temptation inverts the evangelical logic: it is not the absence of battle that saves, but fidelity in battle.
Scrupulosity: Believing One Has Consented at Every Turmoil
An error proper to delicate and anxious souls, deserving to be named apart: the scrupulosity of purity. At every thought, every image, every turmoil of the body, the scrupulous soul anxiously asks "did I consent?", multiplies examinations, accumulates confessions, and ends up living in a permanent terror that poisons its relationship with God. The error is attractive because it mistakes itself for fervor and purity of conscience.
But scrupulosity is not delicacy of conscience: it is its caricature. On these matters — whose objective gravity the Church maintains[27] — the Congregation for the Doctrine of the Faith recalls that account must be taken of "the immaturity of adolescence […], psychic imbalance, or habits contracted," which "can influence behavior, lessening the deliberate character of the act"[28]. Fully culpable consent supposes full advertence and the full consent of the will — which anguish and habit can hinder. Hence confessors apply to timorous souls a prudent pastoral rule: when a habitually upright soul doubts afterward whether it consented, that doubt alone does not suffice to conclude a fault — innocence is presumed, and the soul entrusts itself to obedience to its confessor rather than to anxious examination. This rule holds only under these conditions: it dispenses neither from sincere examination nor from the confession of certain faults. The remedy is not anxious examination but trust, obedience to a confessor, and peace — fruits developed by purity of heart.
Errors of Combat: Mistaking the Strategy
"Temptation Must Be Faced Head-On to Be Conquered"
This is the combat error with the heaviest consequences, because it is noble in appearance. One tells oneself: "I will look temptation in the face, prove that I am strong, expose myself to harden myself." Courage is confused with exposure, and victory with confrontation. The error is attractive because it flatters generosity and because it holds, in fact, in every other battle — where one must hold firm, resist, not retreat.
But the battle for purity is the one won by fleeing. This is the most constant teaching of Scripture and the saints:
"Shun immorality." — First Letter to the Corinthians 6:18[29]
The Greek verb — pheugete, "flee" — commands flight here: it is the same verb by which Paul also orders flight from idolatry[30]. The biblical model is Joseph — Potiphar's wife catches him by his garment, saying: "Lie with me!" — who "left his garment in her hand, and fled and got out of the house"[31]. The tradition of Saint Philip Neri's biographers attributes to him this maxim: in the war of the senses, the victors are the cowards, that is, those who flee[32]. Saint Alphonsus Liguori erects it into a rule: unlike other battles, flee the proximate occasion here without presuming on one's strength, rather than facing it[33]. And Saint Francis de Sales recommends fleeing as fast as possible every occasion and every lure of impurity, for this evil advances insensibly, by small beginnings, toward great falls[34]. Such is the meaning of Christ's hyperbole — "if your right eye causes you to sin, pluck it out"[35] — which commands not mutilation but a decided break with the occasion. Wanting to "face" impure temptation is already having half accepted it. The concrete strategy of flight — cutting off the proximate occasion, guarding the senses — is developed in the battle guide.
"I Will Reason with It, Argue with It"
An intellectual variant of the preceding error: rather than fleeing, "I will argue, remind myself of the reasons not to yield, dialogue with temptation until I convince it." The error is attractive because it seems more mature than flight — that of a man who masters himself by reason.
But arguing with impure temptation is already losing. The property of lust, says Saint Thomas, is precisely to blind the mind: because carnal pleasure is the most vehement, it is in this vice that the use of reason is most hindered, whence "blindness of mind" (caecitas mentis) at the head of its daughters[36]. One does not reason well under the effect of a passion that obscures reason itself: the more one lingers in "dialogue," the more delectation settles in and the more judgment weakens. That is why the saints oppose to impure temptation not an argument but an act: turning away the eyes, changing place, invoking the name of Jesus. Promptness is worth more than dialectics: this evil, teaches Saint Francis de Sales, advances insensibly, by small beginnings, toward great progress[37].
"I Will Manage by My Own Will Alone"
The error of the willing and generous man: he decides "never to fall again," grits his teeth, multiplies heroic resolutions — and counts on his own energy alone to conquer. The error is attractive because it is noble in appearance and flatters self-love: "I will make it on my own."
But chastity is not only a conquest of the will: it is also, and first, a gift of God. Saint Augustine learned this in his own flesh. A slave of habit, he described his servitude: "of my will the enemy had made a chain… from resisted habit is born necessity"[38]. His will alone could do nothing about it; he even prayed, secretly, not to be heard too soon: "Give me chastity and continence, but not yet"[39]. Deliverance came only with grace, and from it he drew the formula that sums up the whole doctrine of combat:
"Give what you command, and command what you will." — Saint Augustine, Confessions, X, 29[40]
Saint John Climacus repeats it in his own way: offering the Lord one's weakness while fully acknowledging one's powerlessness, in order to receive chastity as a gift[41]. The will tensed upon itself is still a form of pride; the true battle passes through the humble avowal of one's powerlessness and recourse to prayer. Saint Alphonsus makes it the key to spiritual combat: having immediate recourse to God through prayer — "he who prays is saved, he who does not pray is damned," the central thesis of his Great Means of Prayer[42].
"Chastity Means Repressing Everything"
The opposite error, and equally false: believing the battle consists in repressing, stifling, silencing by force every movement of the flesh — as if purity were a successful repression. The error is attractive because it seems the logical consequence of the struggle: if desire is the enemy, better to suppress it.
But repression — stifling desire by sheer force, without reorienting it toward God or presenting it to Him in prayer — is not chastity: this violence done to oneself does not pacify, and desire set aside without being converted remains and may resurge with all the more force. The true victory is not the suppression of desire but its transfiguration — not love driven out, but love reoriented. Saint John Climacus teaches this with a striking image: he is chaste who triumphs over carnal love by a greater love, extinguishing the fire of earth by the fire of heaven[43].
The carnal fire is not conquered by denying it, but by lighting a greater fire — the love of God. That is why chastity is not an emptiness but a fullness, not an amputation but a successful integration of sexuality into love. Reducing the battle to repression condemns one to a sad and fragile purity, where the Gospel promises a joyful and free purity. On this positive integration, see How to Grow in Chastity.
"It Is an Addiction: Grace Can Do Nothing, Only Techniques Count"
A modern error, in the inverse direction of "all by the will": from hearing so much about "addiction," it concludes that the battle for purity would be purely psychological or neurological, a matter of mechanisms to reprogram, where grace, the sacraments, and prayer would have nothing to do. The error is attractive because it rests on a share of truth: there are indeed entrenched habits, automatisms, real conditionings.
But reducing this battle to a question of technique ignores its properly spiritual dimension. It is true that habit weighs: the Church herself asks that habit and conditionings be taken into account in judging responsibility[44], and human means — fleeing occasions, cutting off triggers, structuring one's life — have their full place. But habit is not a mechanical fatality: Augustine, a slave of his, was delivered from it only by grace[45]. The Catechism enumerates the means of purity, and they are not only technical: "the virtue and gift of chastity […]; purity of intention […]; purity of vision […]; prayer"[46]. The sacraments — confession that raises up, the Eucharist that strengthens — are weapons no technique replaces, as is the mortification of the body of which Saint Paul speaks: "I pommel my body and subdue it"[47]. Psychology helps to understand the terrain; it does not give the grace that transforms the heart. Opposing the two is a false alternative: human means and supernatural weapons are both needed.
Errors About the Fault, the Fall, and Its Duration
"As Long as I Do Not Pass to the Act, There Is No Sin"
An error that reduces the fault to the sole outward act: lust would become guilty only at the accomplished gesture; thoughts, gazes, interior complacencies would remain innocent. One reassures oneself: "I did nothing." The error is attractive because it bounds sin to the visible.
But Christ moved the boundary inside the heart: "every one who looks at a woman lustfully has already committed adultery with her in his heart"[48]. The fault begins at the interior consent, in the gaze and the complacently nourished desire, well before the gesture. Christ thus brings to fulfillment a demand already present in the Old Covenant: morality does not stop at the outward act, it reaches the heart. Voluntary complacency in impure thought, lingering delectatio morosa, the sought-out gaze — all this is already the battle lost, even without an act. Reducing the fault to the outward act ignores that lust is first an evil of the gaze and the heart. That is also why custody of the eyes — "I have made a covenant with my eyes"[49] — is the first line of combat, not a detail.
"After a Fall, All Is Lost"
An error about the fall, and the most dangerous of all: after falling, one concludes that all is ruined, that the conversion was false, that there is no use fighting anymore. Discouragement settles in, arms are lowered — and it is precisely there, not in the fall itself, that the battle is truly lost. The error is attractive because it disguises itself as humble lucidity: "I see clearly that I will never make it."
But the dejection that follows the fall can become the supreme trap of this battle when it hardens into despair. The dejection felt is not yet a fault: it becomes one if it freezes into consented renunciation — "what is the use of fighting, all is lost." That despair is not humility: Saint Thomas ranks the despair of the age to come among the daughters that lust begets[50] — the enemy that could not hold back by pleasure seeks to finish off by despair. Between the two lies the temptation to despair, which must be fought like every temptation: without complacency in it and without consent to it. Yet the fall is not the defeat; abandoning the battle is. The Church herself says it bluntly:
"Chastity has laws of growth which progress through stages marked by imperfection and often by sin. […] Chastity is a moral virtue. It is also a gift from God, a grace." — Catechism of the Catholic Church, §§ 2343 and 2345[51][52]
Falling is part of the path, provided one rises again. The true remedy after a fall is not self-condemnation but contrition and the confession that raises up, then the peaceful resumption of combat. On how to rise without discouragement, see the battle guide.
"I Am Too Weak, I Will Never Make It"
A variant of discouragement, in the form of definitive resignation: after so many relapses, one concludes that "this vice is stronger than me," that one will never change, that one might as well accommodate it. The error is attractive because it wears the apparent humility of those who "know themselves" — but it is in reality a disguised resignation.
Yet self-mastery is precisely "a long and exacting work," which "presupposes renewed effort at all stages of life"[53]. No one possesses it outright: chastity "is also a gift from God, a grace"[54], received in a battle that lasts as long as life. Acknowledged weakness is not an obstacle to the battle: it is its door, for "my grace is sufficient for you, for my power is made perfect in weakness"[55]. The greatest saints were often former captives: Augustine, a slave of the flesh for years, became the doctor of grace. The weak are not condemned to their weakness: they are called, more than any other, to let grace conquer in them what their will alone could not. Saying "I am lost" may be only a cry of weakness, which God gathers; settling into it in renunciation is closing the door to the victory He wills to give.
"Once Freed, It Is Definitive"
A symmetrical error, proper to those who have won a first victory: believing that chastity, once acquired, is a definitive possession, an impregnable fortress. Guard is lowered, exposure resumes, means are neglected — and one falls back all the harder for having believed oneself sheltered. The error is attractive because regained peace resembles total victory.
But self-mastery — "one can never consider it acquired once and for all"[56] — never rests: concupiscence remains to the end, and vigilance stays necessary to the very end: "Be sober, be watchful: your adversary the devil, like a roaring lion, prowls about"[57], and "watch and pray that you may not enter into temptation"[58]. One day's victory is not a life's peace: purity is a living virtue, kept by daily vigilance and lost by presumption. Believing the battle over is already beginning to lose it.
Purity, Grace, and the Divine Will
All these errors have a common root: wounded concupiscence claiming its enjoyment, and the self-will that wills to conquer alone or despairs alone. That is why the deepest remedy is not a technique nor a tensed effort, but a surrender: substituting God's Will for self-will, letting grace do what the will cannot. Saint Augustine said it in the formula that condenses everything: "Give what you command, and command what you will"[59] — the commanded chastity becomes possible because it is first given.
Two things must be distinguished here: doing God's will — two wills, one's own submitting and God's which one follows — and living in the Divine Will — a single acting will, the Divine living and acting in the soul as it lived in Adam before the fall, according to what Jesus teaches the Servant of God Luisa Piccarreta (1865-1947) in the Book of Heaven (see Doing God's Will and Living in the Divine Will: What Is the Difference?). The battle described until now belongs to the first degree, necessary and meritorious; the promised gift opens the second, where the act becomes divine because God Himself accomplishes it in the surrendered soul.
The secret, then, is not to hunt down desire, but to reorient it toward a greater love, after the image of Saint John Climacus[60]. Christian purity is not an icy emptiness but a heart seized by a greater love, unto that "redemption of the heart" announced by Christ and commented on by Saint John Paul II: the gaze and desire themselves can be healed and rendered capable of seeing the other without lusting[61]. This is Augustine's experience on the morrow of his conversion: the pleasures he feared losing became "sweet to leave"[62], because grace had changed his very desire. Saint Augustine, Saint John Climacus, and Saint John Paul II, cited in this article, did not know this gift as Jesus reveals it to Luisa Piccarreta: they announce its path — avowed powerlessness, reoriented desire, purified gaze — without being its direct witnesses.
The battle against lust therefore ends not in self-mastery alone, but in the freedom of a unified heart, surrendered to the divine Will and capable of loving in truth — a fruit developed, each in its own way, by the battle guide, chastity, and purity of heart.
To Go Further
- How to Grow in the Battle Against Lust — the practical guide: the nature of lust, the mechanism of temptation, custody of the senses, supernatural weapons, and concrete means for waging the battle.
- What the Saints Say About the Battle Against Lust — the sourced florilegium, from the desert (Evagrius, Cassian, Climacus) to our days (Alphonsus, Neri, the Curé of Ars).
- How to Grow in Chastity — the positive virtue into which the battle issues: the successful integration of sexuality into love.
- Common Errors About Chastity and Common Errors About Purity of Heart — the twin misunderstandings about the virtue and about limpidity of heart.
- Common Errors About the Battle Against Acedia and …Against Anger — the twin articles of the same "common errors" series.
Notes and References
Evagrius Ponticus (346-399), Praktikos, § 6: enumeration of the eight generic "thoughts" (logismoi) — gluttony, fornication (porneia), avarice, sadness, anger, acedia, vainglory, pride. Sources chrétiennes edition no. 171 (Cerf). Porneia comes in second position; this schema is the origin of the list of capital sins.
1Catechism of the Catholic Church, § 1866: "Vices can be classified according to the virtues they oppose, or also be linked to the capital sins which Christian experience has distinguished, following St. John Cassian and St. Gregory the Great (Mor. 31, 45). They are called 'capital' because they engender other sins, other vices. They are pride, avarice, envy, wrath, lust, gluttony, and sloth or acedia."
2Saint John Cassian (c. 360-435), Institutes, Book VI, "On the spirit of fornication" (De spiritu fornicationis), Sources chrétiennes edition no. 109 (Cerf): Cassian makes it the second of the eight combats, after gluttony. On chastity as a gift of God crowning ascesis, see his Conferences XII (On Chastity, SC no. 54).
3Catechism of the Catholic Church, § 2342: "Self-mastery is a long and exacting work. One can never consider it acquired once and for all. It presupposes renewed effort at all stages of life (cf. Titus 2:1-6). The effort required can be more intense at certain times, as when the personality is being formed, during childhood and adolescence."
4 53 56First Letter to the Corinthians 6:18-19, after the official liturgical translation (AELF), rendered in English: "Shun immorality. Every other sin which a man commits is outside the body; but the immoral man sins against his own body. Do you not know? Your body is a temple of the Holy Spirit within you, which you have from God; you are not your own." Vulgate: "Fugite fornicationem."
5 19 29Council of Trent, Decree on Original Sin (Session V, 17 June 1546), canon 5 (DS 1515): concupiscence remains in the baptized, but the Catholic Church never understood it to be called sin because it would be "truly and properly sin" in the regenerate; it comes from sin and inclines to sin (ex peccato est et ad peccatum inclinat), and is "left for the battle" (ad agonem relicta). Taken up by CCC §§ 1264 and 1426.
6 25Letter to the Romans 7:22-23, after the official liturgical translation (AELF), rendered in English: "For I delight in the law of God, in my inmost self, but I see in my members another law at war with the law of my mind and making me captive to the law of sin which dwells in my members." Founding text of the Pauline doctrine of interior combat.
7Catechism of the Catholic Church, § 1264: "Yet certain temporal consequences of sin remain in the baptized, such as suffering, illness, death, and the like, as well as an inclination to sin that Tradition calls concupiscence, or metaphorically, 'the tinder for sin' (fomes peccati). Since concupiscence 'is left for us to wrestle with, it cannot harm those who do not consent but manfully resist it by the grace of Jesus Christ. Indeed, he who struggles according to the rules will be crowned' (2 Tim 2:5)" (Council of Trent: DS 1515). Trent's citation integrated into the Catechism.
8First Letter of Saint John 2:16, after the official liturgical translation (AELF), rendered in English: "For all that is in the world — the lust of the flesh, the lust of the eyes, the pride of life — is not of the Father but is of the world." The three concupiscences; cf. CCC § 2514.
9Catechism of the Catholic Church, § 2343: "Chastity has laws of growth which progress through stages marked by imperfection and often by sin. 'But man… day by day builds himself up through his many free choices; and so he knows, loves, and accomplishes moral good by stages of growth' (FC 9)." Magisterial recognition of the progressive and embattled character of growth in purity.
10 51Catechism of the Catholic Church, § 2345: "Chastity is a moral virtue. It is also a gift from God, a grace, a fruit of spiritual effort. The Holy Spirit enables one to imitate the purity of Christ in those whom He has regenerated in the waters of Baptism."
11 52 54Gospel According to Saint Matthew 5:27-28, after the official liturgical translation (AELF), rendered in English: "You have heard that it was said, You shall not commit adultery. But I say to you that every one who looks at a woman lustfully has already committed adultery with her in his heart." A word long commented on by Saint John Paul II in his catecheses on human love (called "theology of the body"), where he analyzes "lust" (which reduces the other to an object) and the "redemption of the heart" — the healing of gaze and desire by grace.
12 14 48 61Catechism of the Catholic Church, § 2351: "Lust is disordered desire for or inordinate enjoyment of sexual pleasure. Sexual pleasure is morally disordered when it is sought for itself, isolated from its procreative and unitive purposes." § 2351 opens the series of offenses against chastity (§§ 2351-2356).
13Saint Thomas Aquinas (1225-1274), Summa Theologiae, IIa-IIae, q. 153, a. 4: lust is a capital vice. A vice is called capital when its end is so desirable that, to obtain it, man commits many sins which proceed from it as from their principle; now the carnal pleasure at which lust aims is one of the most vehement, whence the multiplicity of faults born of it. Working translation after the Revue des Jeunes edition (Cerf).
15Saint Thomas Aquinas, Summa Theologiae, IIa-IIae, q. 153, a. 5, taking up Saint Gregory the Great, Moralia in Job, XXXI, 45: from lust are born eight "daughters." Four on the side of the intellect: blindness of mind (caecitas mentis), thoughtlessness or inconsideration (inconsideratio), rashness (praecipitatio), inconstancy (inconstantia); four on the side of the will: disordered self-love (amor sui), hatred of God (odium Dei), attachment to the present age (affectus praesentis saeculi), and despair or horror of the age to come (desperatio futuri saeculi). Working translation; Latin verifiable in the Marietti edition.
16 50Catechism of the Catholic Church, § 2354: "Pornography consists in removing real or simulated sexual acts from the intimacy of the partners, in order to display them deliberately to third parties. It offends against chastity because it perverts the conjugal act […]. It does grave injury to the dignity of its participants (actors, vendors, the public) […]. It immerses all who are involved in the illusion of a fantasy world. It is a grave offense."
17What Sister Lucia of Fatima (1907-2005), cousin of the seers, records exactly in § 4 ("Lucia's retrospective glance") of her Third Memoir (31 August 1941): when asked whether Our Lady had indicated, in an apparition, "what kind of sins offend the Lord most," she answers that, "from what is recounted, Jacinta, at Lisbon, named that of the flesh" — at once specifying that the link with a word of Our Lady is only her own supposition ("perhaps, it seems to me now: as it was one of the questions she asked me, she may have happened, at Lisbon, to put it to Our Lady herself, and thus to receive this answer"), working translation. Ref.: Fatima in Lucia's Own Words, ed. Louis Kondor, Secretariado dos Pastorinhos, Fatima, 16th ed. July 2007, pp. 126-127 (Italian ed. Memorie di Suor Lucia, vol. I, 8th ed. 2005, pp. 121-122). The formula "The sins that lead the most souls to hell are the sins of the flesh," attributed to Saint Jacinta Marto (1910-1920, canonized in 2017), is thus the traditional form of this reported word, not a verbatim quotation from the Memoirs. A private revelation: it says these sins lose the greatest number of souls, not that they would be the gravest in themselves — pride takes precedence in malice. The explanation by their wide diffusion is a comment of the redactor, not a word of the seer.
18Catechism of the Catholic Church, § 2521: "Purity requires modesty. Modesty is an integral part of temperance. Modesty protects the mystery of persons. It means refusing to unveil what should remain hidden. It is ordered to chastity to whose sensitivity it bears witness. It guides how one looks at others and behaves toward them in conformity with the dignity of persons and their solidarity." What follows on modesty of dress and discretion summarizes §§ 2522-2524.
20Letter to the Hebrews 4:15, after the official liturgical translation (AELF), rendered in English: "For we have not a high priest who is unable to sympathize with our weaknesses, but one who in every respect has been tempted as we are, yet without sin." Foundation of the temptation/sin distinction: the tempted Christ did not sin.
21Letter to the Galatians 5:16-17, after the official liturgical translation (AELF), rendered in English: "Walk by the Spirit, and do not gratify the desires of the flesh. For the desires of the flesh are against the Spirit, and the desires of the Spirit are against the flesh." "Flesh" here denotes man surrendered to disorder, not the body as such.
22Saint Thomas Aquinas, Summa Theologiae, Ia-IIae, q. 74, a. 6-8 (text verified on newadvent.org): the so-called "morose" delectation — from mora, delay, lingering — belongs to the sin of the reason that dwells on it (a. 6), distinct from consent to the act (a. 7-8). The doctrinal anchor of the distinction between the pleasure lingered over with complacency, already imputable, and the full decision to pass to the act.
23Second Letter to the Corinthians 12:7-9, after the official liturgical translation (AELF), rendered in English: "…a thorn was given me in the flesh, a messenger of Satan to harass me, to keep me from being too elated. Three times I besought the Lord about this, that it should leave me; but he said to me: 'My grace is sufficient for you, for my power is made perfect in weakness.'" The verse does not specify the nature of this thorn: it founds the doctrine of grace in acknowledged weakness, not identification with carnal concupiscence.
24 55Saint John Climacus, The Ladder of Divine Ascent, 15th step, trans. Fr. Placide Deseille, Spiritualité orientale no. 24, Bellefontaine Abbey: paraphrase — offering the Lord one's weakness while fully acknowledging one's powerlessness, in order to receive chastity as a gift, not as a pure conquest. Cf. Cassian, Conferences XII (On Chastity, SC no. 54): perfect chastity is presented there as a gift of God crowning ascesis without being produced by it alone.
26 41Catechism of the Catholic Church, § 2352: "By masturbation is to be understood the deliberate stimulation of the genital organs in order to derive sexual pleasure"; "masturbation is an intrinsically and gravely disordered action." A capital distinction between the objective gravity of the act and subjective culpability: on the assessment of responsibility (immaturity, habit, psychic imbalance), see the Declaration Persona Humana of the Congregation for the Doctrine of the Faith (29 December 1975), § 9 (next note).
27Congregation for the Doctrine of the Faith, Declaration Persona Humana on Certain Questions Concerning Sexual Ethics (29 December 1975), § 9: "[…] the immaturity of adolescence, which can sometimes persist beyond that age, psychic imbalance, or habits contracted can influence behavior, lessening the deliberate character of the act, so that subjectively there may not always be grave fault. However, in general, the absence of grave responsibility must not be presumed; this would be to misunderstand people's moral capacity." Working translation from the official French text (vatican.va).
28 44First Letter to the Corinthians 10:14, after the official liturgical translation (AELF), rendered in English: "Therefore, my beloved, shun the worship of idols." The same Greek verb (pheugein, "to flee") thus commands fleeing debauchery and fleeing idolatry: before certain powers of evil, Scripture prescribes flight, not confrontation.
30Book of Genesis 39:12, after the official liturgical translation (AELF), rendered in English: "She caught him by his garment, saying, 'Lie with me!' But he left his garment in her hand, and fled and got out of the house." Become for the Fathers the type of the just man who flees the occasion rather than facing temptation.
31Saint Philip Neri (1515-1595): a maxim attributed to him by the tradition of his biographers — in the war of the senses, the victors are the cowards, that is, those who flee the occasion (cf. Pietro Giacomo Bacci, Vita di san Filippo Neri). The traditional formulation of the primacy of flight in this battle.
32Saint Alphonsus Liguori (1696-1787): a constant rule of his spiritual works (The True Spouse of Jesus Christ; The Practice of the Love of Jesus Christ; Theologia moralis, lib. VI) — in temptations against purity, unlike other battles, flee the proximate occasion without presuming on one's strength, rather than facing it. Paraphrase of his teaching.
33Saint Francis de Sales (1567-1622), Introduction to the Devout Life (1609), Part III, ch. XIII (Counsels for preserving chastity): paraphrase of the chapter's teaching — flee as fast as possible the occasions and lures of impurity, for this evil advances insensibly, by small beginnings, toward great falls.
34 37Gospel According to Saint Matthew 5:29, after the official liturgical translation (AELF), rendered in English: "If your right eye causes you to sin, pluck it out and throw it away; it is better that you lose one of your members than that your whole body be thrown into hell." Semitic hyperbole: not mutilation, but a decided break with the occasion of sin.
35Saint Thomas Aquinas, Summa Theologiae, IIa-IIae, q. 153, a. 5, taking up Saint Gregory the Great (Morals on Job, XXXI): because venereal pleasure is the most vehement, it is in lust that the use of reason is most hindered; hence "blindness of mind" (caecitas mentis), first of the "daughters of lust" (filiae luxuriae). Reference edition: French trans. of the Revue des Jeunes (Cerf).
36Saint Augustine, Confessions, Book VIII, ch. 5, § 10: "Velle meum tenebat inimicus, et inde mihi catenam fecerat…" — "Of my will the enemy had made a chain: from perverse willing is born passion, from passion indulged is born habit, from unresisted habit is born necessity." Reference edition: Les Confessions, Bibliothèque augustinienne (Desclée de Brouwer). Classic analysis of the chaining of carnal habit.
38 45Saint Augustine (354-430), Confessions, Book VIII, ch. 7, no. 17: "Da mihi castitatem et continentiam, sed noli modo" — "Give me chastity and continence, but not yet." Augustine reports the prayer of his youth still enslaved to the flesh. Latin text on thelatinlibrary.com; working translation.
39Saint Augustine, Confessions, Book X, ch. 29, § 40: "Da quod iubes et iube quod vis" — "Give what you command, and command what you will." The capital formula of the Augustinian doctrine of grace, uttered precisely concerning continence ("You command us continence"); it was at the heart of the Pelagian controversy. Working translation.
40 59Saint Alphonsus Liguori, The Great Means of Prayer (Del gran mezzo della preghiera, 1759): "He who prays is saved, he who does not pray is damned." The central thesis of the work on the necessity of prayer, applied here to the battle for purity, where prayer obtains the strength that nature alone lacks — by at once invoking the names of Jesus and Mary until the temptation ceases.
42Saint John Climacus (c. 579-649), The Ladder of Divine Ascent (Klimax), 15th step ("On Chastity"), trans. Fr. Placide Deseille, Spiritualité orientale no. 24, Bellefontaine Abbey: paraphrase — he is chaste who triumphs over carnal love by a greater love, extinguishing the fire of earth by the fire of heaven. Purity there is reorientation of desire, not suppression.
43 60Catechism of the Catholic Church, § 2520: "Baptism confers on its recipient the grace of purification from all sins. But the baptized must continue to struggle against concupiscence of the flesh and disordered desires. With God's grace he will prevail: by the virtue and gift of chastity […]; by purity of intention […]; by purity of vision, exterior and interior; by discipline of feelings and imagination […]; by prayer." The canonical list of the means of purity.
46First Letter to the Corinthians 9:27, after the official liturgical translation (AELF), rendered in English: "But I pommel my body and subdue it, lest after preaching to others I myself should be disqualified." Vulgate: "castigo corpus meum et in servitutem redigo." Pauline foundation of bodily ascesis at the service of combat.
47Book of Job 31:1, after the official liturgical translation (AELF), rendered in English: "I have made a covenant with my eyes; how then could I look upon a young virgin?" The classic biblical source of "custody of the eyes."
49First Letter of Saint Peter 5:8, after the official liturgical translation (AELF), rendered in English: "Be sober, be watchful. Your adversary the devil prowls around like a roaring lion, seeking some one to devour." Scriptural foundation of vigilance in spiritual combat.
57Gospel According to Saint Matthew 26:41, after the official liturgical translation (AELF), rendered in English: "Watch and pray that you may not enter into temptation; the spirit indeed is willing, but the flesh is weak." Christ's word at Gethsemane, foundation of prayerful vigilance.
58Saint Augustine, Confessions, Book IX, ch. 1, § 1: on the morrow of his conversion, Augustine notes that the pleasures he feared losing had become sweet to leave — "it had become sweet to me to do without the sweetness of those trifles" — a sign that grace had changed his very desire.
62