What is the discernment of spirits?

Before discerning, one must understand what is being discerned. Spiritual language speaks of “spirits” in the plural: this is a way, inherited from Scripture, of naming the forces that move the heart without it always being their author.

A “motion”: a movement of the heart

Spiritual masters call a motion any interior movement that urges or restrains: a thought that imposes itself, a desire that rises, an attraction to good, an aversion to duty, sudden joy, sadness without cause. Our interior life is not a still lake: it is crossed, from morning to night, by these successive waves. Most go unnoticed; some orient an entire life. Discernment begins with an act of attention: becoming aware of these motions instead of being overwhelmed by them.

Three possible sources

Tradition recognizes, at the root of these movements, three sources that must be carefully distinguished:

• The good spirit: God Himself, through His Holy Spirit, inspirations, the voice of grace and the good angel. Its motions lead to true good, peace, humility, and charity.
• The self: our own nature, with its temperament, imagination, sensitivity, wounds, and disordered desires — what tradition calls the flesh, not the body, but the man left to himself. Its motions are not always bad, but they are ambiguous and often seek their own satisfaction.
• The evil spirit: the demon and his suggestions, who push toward evil either openly or — much more often — under appearances of good.

Saint Paul grounds this distinction when he contrasts the man “animated by the Spirit”, who “tests everything”, with the man left to his own powers, incapable of welcoming what comes from God:

“The natural person does not accept the things of the Spirit of God, for they are folly to him, and he is not able to understand them because they are spiritually discerned. The spiritual person judges all things, but he himself is judged by no one.” — Saint Paul, 1 Corinthians 2:14-15^[4]

Discernment of spirits ≠ discernment of phenomena

A clarification is necessary from the start, as confusion is frequent. The discernment of spirits, the subject of this article, concerns the interior motions of the soul: it is exercised in the secret of the heart, in prayer, examination, and spiritual direction. The discernment of supernatural phenomena — apparitions, public locutions, miracles, stigmas — concerns external facts and ultimately falls under the judgment of ecclesiastical authority, according to specific criteria and procedures. The two overlap (an apparition involves both), but they are not the same. For the latter, see Criteria for Discernment of Supernatural Phenomena, How to Discern a Marian Apparition?, and How to Recognize a False Apparition?.

Discernment is not an invention of mystics: it is an apostolic command. Scripture establishes both the duty to discern and the first criteria for doing so.

“Test the spirits to see whether they are from God”

The foundational text is the First Letter of Saint John. Faced with the proliferation of false prophets, the apostle does not invite credulity nor distrust, but examination:

“Beloved, do not believe every spirit, but test the spirits to see whether they are from God, because many false prophets have gone out into the world.” — First Letter of Saint John 4:1^[5]

And immediately, John gives a first Christological criterion: every spirit that confesses Jesus Christ coming in the flesh is from God; the one who does not confess Him is not^[6]. The touchstone is therefore not the intensity of a feeling, but the truth of the faith to which the motion leads. John concludes with a formula that sums up the whole issue: “By this you know the Spirit of truth and the spirit of error.”^[7]

“Discern the value of everything”

Saint Paul gives the Thessalonians the same instruction, balancing it: neither quench the Spirit out of suspicion, nor swallow everything naively, but sort through:

“Do not quench the Spirit. Do not despise prophecies, but test everything; hold fast what is good; abstain from every form of evil.” — Saint Paul, 1 Thessalonians 5:19-22^[8]

Discernment thus keeps an equal distance from two opposite errors: rationalism, which prematurely stifles every spiritual motion, and credulity, which accepts everything without examination.

The rule of fruits

How to sort? The Lord Himself gave the surest and most accessible criterion: that of fruits.

“You will recognize them by their fruits. Are grapes gathered from thornbushes, or figs from thistles? […] Every good tree bears good fruit, but the bad tree bears bad fruit.” — Gospel according to Saint Matthew 7:16-17^[9]

Saint Paul specifies what these fruits are. To the tree of the good spirit, he attributes a particular flavor — “love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, self-control”^[10] — while the works of the flesh betray themselves by “discord, jealousy, fits of anger, rivalries, divisions”^[11]. A motion that, in the long run, divides, agitates, hardens, is not from the same tree as one that soothes, unites, and humbles — whatever appearances may be.

The warning: “Satan disguises himself as an angel of light”

The major difficulty remains, the one that makes discernment necessary and delicate: evil almost never presents itself as such. Saint Paul warns without hesitation:

“And no wonder, for even Satan disguises himself as an angel of light.” — Saint Paul, 2 Corinthians 11:14^[12]

This is the whole drama of discernment: it is not only about distinguishing obvious good from evil, but about unmasking a false good, a borrowed light, a zeal that flatters, an “inspiration” that exalts the self under the guise of generosity. The Letter to the Hebrews notes that this ability is not improvised: it presupposes “trained faculties to distinguish good from evil”^[13], the fruit of long practice.

The Church speaks of discernment on two levels that must not be confused: as an ordinary virtue, to which every Christian is called, and as an extraordinary charism, given to some for the good of the Church.

Discernment as a virtue: “discretion”

At its first level, discernment is a virtue related to prudence: the capacity, refined by grace, experience, and humility, to judge soundly one’s own movements and those of others. The Latin tradition named it discretio, discretion — not worldly reserve, but the art of distinguishing (from the Latin discernere, to separate, to sort). This virtue is also nourished by the gifts of the Holy Spirit, especially the gifts of knowledge and counsel, which make the soul docile to divine motions. It is, to varying degrees, accessible to all: it is exercised by the penitent in the examination of conscience, the spouse weighing a decision, the Christian testing a “good idea” before following it.

The charism of the discernment of spirits

At a second level, discernment is a charism, that is, a free gift (charisma) that the Spirit grants not for the sanctification of the one who receives it, but for the service of others. Saint Paul explicitly ranks it among the manifestations of the Spirit:

“To one is given the working of miracles, to another prophecy, to another the discernment of spirits; to one, various kinds of tongues; to another, the interpretation of tongues.” — Saint Paul, 1 Corinthians 12:10^[14]

This charism — “the discernment of spirits,” according to the traditional translation — enables one to read the heart, to recognize the origin of a motion in another, to untangle truth from falsehood in spiritual phenomena. Many saints have possessed it to a high degree: the Curé of Ars reading consciences in the confessional, Padre Pio unmasking illusions, the great spiritual directors.

No charism judges itself

But the Church immediately recalls an essential rule: a charism does not authenticate itself. The more extraordinary a gift is, the more it must be submitted to the discernment of authority. The Catechism, citing the Second Vatican Council, states this clearly:

“In this sense, the discernment of charisms is always necessary. No charism dispenses from reference and submission to the pastors of the Church. It is especially for them not to quench the Spirit, but to test everything and hold fast what is good.” — Catechism of the Catholic Church, § 801^[15]

Thus the discernment of spirits always involves an ecclesial dimension: the ultimate criterion of a spirit that comes from God is that it leads to charity, unity, and obedience to the Church, never to pride or division^[16].

Long before systematic treatises, discernment was the heart of monastic wisdom. In the Egyptian desert during the 4th and 5th centuries, the Fathers made discretio the chief virtue of the entire spiritual life.

The Discernment of Thoughts (the logismoi)

The monks quickly discovered that the true battle is not first against external things, but against the thoughts (logismoi) that assail the heart. Evagrius Ponticus (345–399) provided the first systematic analysis: he described the eight evil thoughts—gluttony, lust, avarice, sadness, anger, acedia, vainglory, pride—as the roots of all vices, and taught how to catch them at their inception, before they become consent^[17]. For him, discernment is observing the thought at its point of origin: recognizing the intruder before it settles in. This analysis, transmitted to the West by Cassian, is the direct ancestor of the Ignatian rules.

Cassian: Discretion, “Mother of the Virtues”

It was Saint John Cassian (c. 360–435) who brought this wisdom to the West in his Conferences. The second, under the authority of Abbot Moses, is entirely devoted to discretion. Cassian first recounts a saying of Saint Anthony the Great, the father of monks: when asked about the greatest virtue, the elders cited fasting, vigils, poverty; Anthony replied that all are necessary, but “discretion alone can surely lead a religious to God” and that it “preserves the other virtues from all error”^[18]. Without it, even austerities mislead.

Cassian then gives the classic definition that has endured:

“Discretion is the mother, guardian, and director of all virtues.” — Saint John Cassian, Conferences, II (Abbot Moses)^[19]

He illuminates it with the Gospel image of the eye: just as the eye is the lamp of the body, discretion is the light of the soul, which enlightens all thoughts and actions:

“This discretion is the eye and the light of which the Savior speaks in the Gospel: if your eye is sound, your whole body will be full of light; but if it is bad, your whole body will be full of darkness.” — Saint John Cassian, Conferences, II^[20]

The Way to Acquire It: Humility

How does one obtain this virtue? Cassian answers straightforwardly: through humility, concretely expressed by opening the heart to an elder and distrusting one’s own judgment. The monk who keeps his thoughts secret falls into illusion; the one who exposes them to a spiritual father sees their poison immediately lose its power. This insight—manifesting one’s thoughts to disarm them—underpins the entire Catholic practice of spiritual direction, to which we will return.

In the 16th century, a former soldier turned pilgrim systematized this millennia-old wisdom into a body of rules of almost clinical precision. Converted on his sickbed, Ignatius of Loyola (1491–1556) noticed that certain daydreams left him “dry and discontented,” while the thought of imitating the saints left him “joyful and content”: he had discovered, in his own experience, the difference of spirits. From this observation were born the Rules for the Discernment of Spirits, placed at the end of the Spiritual Exercises.

Consolation and Desolation: The Grammar of Interior Motions

Ignatius reduces all interior motions to two fundamental states. Consolation is any movement that draws one closer to God:

“I call consolation every increase of hope, faith, and charity, and every interior joy which calls and attracts to heavenly things and to the good of the soul itself, by resting and pacifying it in its Creator and Lord.” — Saint Ignatius of Loyola, Spiritual Exercises, no. 316^[21]

Desolation is its exact opposite—not merely a sad mood, but a movement that turns one away from God:

“I call desolation the exact opposite: darkness and turmoil in the soul, movement toward what is low and earthly, uneasiness caused by various agitations and temptations, the soul feeling lazy, tepid, sad, and as if separated from its Creator and Lord.” — Saint Ignatius of Loyola, Spiritual Exercises, no. 317^[22]

The subtlety of Ignatian discernment lies in one remark: these two states are not interpreted the same way depending on the person’s deep orientation. For one who is walking toward God, the good spirit gives courage and peace, the evil spirit causes anxiety and discouragement; for one who is going the wrong way, it is the opposite—the evil spirit flatters and lulls, the good spirit awakens remorse. The same turmoil thus has different meanings for the convert and the hardened sinner.

The Rules of the First Week: Do Not Yield to Desolation

For beginners, Ignatius gives rules of spiritual common sense that are very reliable. The most famous concerns how to act in desolation: never make decisions then.

In times of desolation, one must never make changes, but remain firm and constant in the resolutions made the day before this desolation, or in the decision one was in during the previous consolation.^[23]

The reason is clear: since the good spirit mainly guides us in consolation and the evil spirit in desolation, following desolation is following a bad counselor. Ignatius adds that one must then act against it: insist more on prayer, examination, and penance, rather than relaxing effort^[24]. Finally, desolation is not always evil: God permits it to test, purify, and teach us that consolation is a gift, not a right. For more on this night of prayer, see How to Know if an Inspiration Comes from God?.

The Rules of the Second Week: Unmasking the “Angel of Light”

As one advances, the battle becomes more refined. To the beginner, the enemy offers crude goods; to the fervent soul, he dares no longer: he disguises himself. Here Ignatius takes up Saint Paul’s warning (2 Cor 11:14) and turns it into a practical rule: the evil angel takes the appearance of an angel of light.

The characteristic of the evil angel, who transforms himself into an angel of light, is to enter into the views of the faithful soul in order to come out with his own: he first suggests good and holy thoughts, conforming to that just soul, then little by little seeks to draw it into his hidden deceptions and perverse intentions.^[25]

Hence the great rule of the course of a thought: to unmask deception, one must examine not only its appearance but its beginning, middle, and end. If the entire course of a thought is good and leads to good, it is a sign of the good spirit; but if, in the end, it results in something bad, dissipating, or weakening the soul, it is an indication of an evil spirit^[26]. An inspiration is judged by its trajectory, not by its initial spark.

Consolation “without previous cause”

Ignatius reserves a special case: consolation without previous cause. When a spiritual joy fills the soul without any object, thought, or cause provoking it, it comes from God alone, “for it belongs to the Creator alone to enter the soul, to leave it, and to excite movements within it”^[27]. This is the only absolutely certain consolation. But Ignatius, a keen observer, immediately warns: one must distinguish the moment of this pure consolation from the afterward, when our own thoughts and the enemy can mingle with the received light — and this is still a time for discernment.

Beyond the schools, the Catholic tradition has identified a set of converging criteria to recognize the origin of an interior motion. None taken alone is absolute; it is their convergence that establishes moral certainty.

Conformity to faith and the commandments

This is the primary and non-negotiable criterion. A spirit that urges something contrary to the faith of the Church, the morality of the Gospel, or the commandments of God does not come from God—no matter how sweet the accompanying feeling. God does not contradict Himself: He cannot inspire what He has forbidden. Any “inspiration” that would exempt one from the humble duties of one’s state or from common precepts is thereby disqualified.

The fruits: peace, humility, charity

Next comes the rule of the fruits (Mt 7:16), the most practical. The good spirit produces a deep peace (different from excitement), a true humility (which makes one small, not important), and a charity that opens one to others and to obedience. The evil spirit, even under pious appearances, ultimately leaves a recognizable trail: trouble, agitation, subtle pride, contempt for others, discouragement. Saint Teresa of Avila made this her criterion for judging locutions: words that come from God effect what they say, leaving the soul at peace, humble, and inclined to good; those that come from imagination or the enemy vanish or disturb^[28].

Peace of heart, a (fallible) sign of the good spirit

Peace deserves special attention, as it is the great indicator—though not infallible. The peace spoken of by the saints is not the absence of trial nor sensory contentment: it is a quiet stability deep in the soul that remains even amid difficulty. Saint Francis de Sales taught that divine inspirations, even demanding ones, enter the heart with a “sweet violence” that soothes, while feverish agitation and disturbance almost always bear the mark of one’s own spirit or the enemy^[29]. Golden rule: never decide in the midst of turmoil; wait for peace to return before deciding.

A modern testimony illustrates this fallibility of feeling alone: in her journal entry of 22 April 1981, Madame R. distinguishes God’s peace—“a peace full of strength” that “sets one back on one’s feet” to face the battle, and which “may not be felt” since it lies “beyond sensibility”—from a false peace “full of tranquillity, of false joy,” a “sort of sweetness” that “takes away strength and courage”^[30]. A simple personal experience, not a rule sufficient on its own.

Docility to the Church and obedience

A spirit that comes from God always leads to unity and trusting submission to the Church, never to proud autonomy. This is the ecclesial criterion already encountered (CCC § 801): the demon, even when imitating light, always betrays at some point a hint of disobedience, singularity, or division. Conversely, humble obedience—even if costly—defuses the subtlest illusions. This is why the saints most favored with extraordinary graces were also the most obedient.

Unmasking false lights

The most difficult case remains: the false light, the illusion that dresses itself in the colors of good. The warning signs are well known: a thought that presses and cannot bear delay; zeal that lowers others; devotion that isolates from ordinary duty; a “generosity” which, examined thoroughly (the Ignatian rule of beginning-middle-end), leads to self-love, dissipation, or discouragement. Holiness, by contrast, has the opposite face: it is patient, humble, unifying, and grows over time.

A conviction runs throughout the tradition: no one judges themselves well. Self-love blinds us; the enemy exploits this blindness. That is why the Church has always united discernment with spiritual accompaniment.

Revealing One’s Heart

The intuition of the Desert Fathers—to expose one’s thoughts in order to disarm them—remains the golden rule. A motion kept secret grows in the shadows; exposed simply to a prudent guide, it can be judged in the light. The Catechism recognizes in spiritual direction a true gift of the Spirit at the service of prayer:

“The Holy Spirit gives certain faithful the gifts of wisdom, faith, and discernment for the sake of the common good that is prayer (spiritual direction).” — Catechism of the Catholic Church, § 2690^[31]

Choosing a “Learned, Prudent, and Experienced” Guide

But one must choose well. The Catechism here cites Saint John of the Cross, who emphasizes three qualities of the guide:

“Not only must the director be learned and prudent, but also experienced… If the spiritual guide lacks experience of the spiritual life, he is incapable of leading the souls whom God calls, and he will not even understand them.” — Saint John of the Cross, Living Flame of Love, stanza 3, quoted by the CCC § 2690^[32]

The director neither replaces conscience nor the Holy Spirit: he helps the soul read within itself the motions of God, like a doctor helps interpret symptoms. For more on choosing and the role of such a guide, see How to Choose a Spiritual Director?.

A particular case deserves to be singled out, as it recurs constantly in spiritual life: distinguishing the trial that God permits to foster growth, from the temptation that pushes toward sin. The two can resemble each other—same dryness, same difficulty—but their source and outcome differ. The Catechism, commenting on “Lead us not into temptation,” presents this as a proper work of the Spirit:

“The Holy Spirit enables us to discern between trial, necessary for the growth of the inner man, and temptation, which leads to sin and death. We must also discern between ‘being tempted’ and ‘consenting’ to temptation.” — Catechism of the Catholic Church, § 2847^[33]

Discernment then unmasks the lie of temptation: its object appears “good, pleasing to the eyes, desirable” (cf. Gn 3:6), while its fruit is death^[34]. Knowing that temptation itself is not sin—only consent to it is—frees one from anxiety and allows one to fight with peace. On this distinction, see What Is the Difference Between Temptation and Sin?.

The discernment of spirits is not reserved for mystics or great decisions. It is a way of inhabiting one’s interior life, day by day, under God’s gaze.

The Examen, a Daily School of Discernment

The simplest and most powerful tool is the examination of conscience—and, in the Ignatian tradition, the evening examen, which is not primarily a list of faults but a review of the day’s motions: where did I feel consolation, peace, an impulse toward God? Where disturbance, flight, withdrawal? By identifying these traces, one gradually learns to recognize the “color” of the good spirit in one’s own life. This is how those “trained senses” spoken of in the Letter to the Hebrews are formed (Heb 5:14).

Prayer, the Condition for Discernment

One discerns well only in prayer, because discernment is ultimately listening to God. Without a regular prayer life, the ear of the heart remains deaf to the delicate motions of grace, and one confuses one’s own desires with the voice of God. Prayer also requires light: the Spirit who inspires is also the one who enables recognition of those inspirations. Humbly asking for discernment is already exercising it.

Patience and Freedom of Heart

Finally, discernment presupposes an interior freedom: as long as I cling in advance to a particular outcome, I cannot judge healthily what moves me toward it. The masters call this indifference—not apathy, but availability to want what God wants, whatever it may be. To those who seek thus, in peace, prayer, and humble docility, God never refuses the necessary light. “Test the spirits,” Saint John asked—not to live in distrust, but to walk confidently, step by step, in the trust of a God who speaks to the heart of those who listen.

• How to Know if an Inspiration Comes from God? — the practical “how-to” of discernment applied to a concrete inspiration.
• Criteria for Discernment of Supernatural Phenomena — discernment of external facts (apparitions, visions, miracles), to be distinguished from the discernment of interior motions.
• How to Choose a Spiritual Director? — accompaniment, without which self-discernment remains fragile.
• What Is the Difference Between Temptation and Sin? — discerning trial, temptation, and consent.
• How to Discern One’s Vocation? — discernment applied to the choice of a state of life.
• What Is Actual Grace? — God’s inspirations are actual graces: recognizing their motions is the very object of discernment.