The Infinite Love of God in the Sacred Heart and Divine Mercy

Biblical anthropomorphism: a God with "womb"

God, being spirit — the Catechism recalls that he "transcends the distinction of the sexes: he is neither man nor woman, he is God" (§370)^[1] — obviously has no fleshly heart. But Scripture, following a mode of expression universal to humanity, constantly ascribes to him a heart and womb to express what, in God, corresponds to the seat of affection, compassion and merciful decision. Pope Francis recalls this precedence of the heart in his encyclical Dilexit nos of 24 October 2024:

"When we are tempted to skim the surface, to live in haste without knowing why, [...] we must rediscover the importance of the heart." — Pope Francis, Dilexit nos, no. 2 (24 October 2024)^[2]

This anthropology of the heart, far from being a concession to sentimentalism, is for Scripture "the core of every human being, its innermost centre"^[3]: it is there that man loves, decides, believes and gives himself. When Scripture speaks of the Heart of God, it therefore aims — by analogy — at the living and free centre of the divinity, where God chooses to love.

The etymology of mercy: miser and cor

The word "mercy" comes from the Latin misericordia, formed from miserere ("to have pity, to suffer with") and cor, cordis ("heart"). Mercy is therefore literally the heart that lets itself be touched by the misery of the other. The place of mercy, in God as in man, is par excellence the heart. This is why the devotion to the Heart of Christ and the devotion to divine Mercy are from the outset, etymologically, the same mystery under two aspects.

Saint Thomas Aquinas would take up the etymology to transpose it into his theology of God: to show mercy is, he teaches, proper to God, and it is especially in this that his omnipotence is manifested^[4]. For Thomas, mercy is therefore not a secondary attribute but the highest expression of divine power — the exact opposite of the popular image of a God torn between justice and pity.

The "Heart" of God in the Old Testament

The Old Testament dares images of overwhelming intensity. Before the people of Ephraim, who would merit punishment, God himself says, through the mouth of the prophet Hosea:

"How can I give you up, Ephraim? How can I hand you over, Israel? [...] My heart recoils within me; my compassion grows warm and tender. I will not execute my fierce anger [...], for I am God and no mortal, the Holy One in your midst, and I will not come in wrath." — Hosea 11:8–9^[5]

The prophet Jeremiah unfolds the same image, making heard the loving plaint of a God wounded by the indifference of his people:

"Is Ephraim my dear son? Is he the child of my delight? For as often as I speak against him, I do remember him still. Therefore my womb yearns for him; I will surely have mercy on him — oracle of the Lord." — Jeremiah 31:20^[6]

A few chapters later, God promises an eternal covenant, pronounced "with all my heart and all my soul"^[7] — a rare and powerful formula: it is God's own intimate commitment to make his people happy. The Heart of God thus appears as the hidden hearth whence spring all the promises of happiness, return and forgiveness.

The "womb of mercy" in the New Testament

The language of the womb passes naturally into the New Testament. Zechariah, in his canticle, ascribes to God himself "the womb of mercy":

"By the tender mercy of our God, the dawn from on high has visited us, to give light to those who sit in darkness and in the shadow of death." — Luke 1:78–79^[8]

To speak in very human terms — Pius XII recalls that one must then "use analogies, never forgetting that God transcends them"^[9] — the spiritual tradition likes to say that it is with his head that God does justice, but with his womb that he forgives. Saint Paul would take up this image, asking Christians to put on "a heart of mercy" (Col 3:12) in the likeness of their Master.

Habakkuk 3:4: "two rays go forth from his hands"

Several centuries before Christ, the prophet Habakkuk, contemplating the Lord's theophanic coming, wrote a strange and precise image:

"His splendour is like the light, two rays come forth from his hands: there is the seat of his power." — Habakkuk 3:4^[10]

Some modern spiritual writers — notably the editors of the Bollettino della Divina Misericordia at the Łagiewniki shrine (Kraków) — propose seeing in this image a figure of the blood and water that would one day flow from the side of Jesus and — later still — of the red and pale rays of the image of Divine Mercy revealed to Saint Faustina in 1931. The "seat of God's power", says Habakkuk, is not a thunderbolt or a sword: it is two rays coming forth from his hands. This is the very definition of mercy — omnipotence that gives itself.

The lance thrust and the blood mingled with water

The foundational passage of all devotion to the Sacred Heart is the Johannine account of the lance thrust at the foot of the cross. The evangelist insists on the value of eyewitness testimony:

"One of the soldiers with a lance pierced his side; and immediately there came out blood and water. He who saw it has borne witness, and his witness is true; he knows that he tells the truth, that you also may believe." — John 19:34-35^[11]

On the medical level, commentators note that post-mortem wounds do not close: the open side of Christ remains open for ever. On the spiritual level, it is precisely this permanence of the Open Heart that grounds the confidence of wounded souls: "You must not doubt, nor despair, sinner", Jesus will have Saint Faustina say, "but trust in mercy"^[12].

The Catechism's sacramental reading

The Catechism of the Catholic Church sees in the blood and water the source of the sacraments, and more particularly of baptism and the Eucharist:

"The blood and water that flowed from the pierced side of Jesus crucified (Jn 19:34) are types of Baptism and the Eucharist, sacraments of the new covenant (cf. 1 Jn 5:6-8): from then on, it is possible 'to be born of water and the Spirit' in order to enter the Kingdom of God (Jn 3:5)." — CCC, §1225^[13]

This sacramental reading is not a medieval invention: it goes back to the Fathers, and notably to Saint John Chrysostom, who sees in the pierced side of the new Adam asleep the birth of the Church, just as Eve came forth from the side of the first Adam asleep^[14]. The Pierced Heart is thus at once: the biological source of the blood shed for Redemption, the sacramental source of the Christian life, and the mystical source of the devotion that would unfold over two thousand years.

The Heart open for ever

Saint Faustina would sum up this permanence of the gift in a few words:

"The bowels of divine mercy are opened for us by the life of Jesus, nailed to the cross. [...] Two rays in the form of streams gushed forth from the Heart of Jesus, not for the Angels, nor for the Cherubim, nor for the Seraphim, but for man, full of sins." — Saint Faustina Kowalska, Little Diary, poem after §521 (notebook I)^[15]

The invocation "O Blood and Water, which gushed forth from the Heart of Jesus as a fount of mercy for us, I trust in You!" — which will be taken up by the whole Church in the Chaplet of Divine Mercy — is noted as early as entry §84 of the Little Diary, dated 2 August 1934^[16].

The Fathers before the Open Heart

The Greek and Latin Fathers, without building a formal liturgical devotion, meditated at length on the Pierced Heart of Christ as the "source of the sacraments" and "door of salvation". Saint Augustine, commenting on John 19:34, sees in the wound of the side the fulfilment of the prophecy of Ezekiel 47 on the river flowing from the Temple: "the gate of life has been opened"^[17]. Saint John Chrysostom insists, as we have seen, on the birth of the Church from the Open Heart. Saint Bonaventure in the 13th century would develop these images in his Vitis mystica, where he invites the soul to "enter through this wound into the very Heart of Christ"^[18].

Saint Gertrude of Helfta and the dialogue with Saint John

It is, however, in Saint Gertrude of Helfta (1256-1302), a Cistercian nun of Saxony, that the devotion takes on a properly mystical face. In her Revelations, recorded by her sisters at the monastery of Helfta, Gertrude recounts a dialogue with Saint John the Evangelist, who himself appeared to answer the question that burns within her: if he, the Beloved Disciple, rested on the Saviour's breast at the Last Supper (Jn 13:25), why did he say almost nothing about the Heart of Jesus in his Gospel?

"— Why, then, have you kept so absolute a silence on this subject, and written nothing of it for the profit of our souls?

— My mission was to manifest to the new Church, by a single word, the uncreated Word of God the Father [...]. The sweet eloquence of the beats of the Sacred Heart is reserved for the last times, so that the aged and torpid world may be warmed in the love of its God." — Saint Gertrude of Helfta, Revelations (The Herald of Divine Love), book IV, ch. 4^[19]

This page, translated and widely disseminated from the 17th century onwards, would be read with astonishment even in the age of the apparitions of Paray-le-Monial: the promise of a disclosure "for the last times" then seemed to be coming true.

Saint John Eudes (1601-1680), liturgical Father of the Sacred Heart

Even before Paray-le-Monial, Saint John Eudes — founder of the Congregation of Jesus and Mary (the Eudists) — establishes as early as 1672 a feast of the Sacred Heart of Jesus within his seminaries, after having set up a feast of the Heart of Mary in 1648. Pius XI would proclaim him "Father, Doctor and Apostle of the liturgical cult of the Hearts of Jesus and Mary"^[20]. His comparison of the Love of the Heart of Jesus has remained famous:

"Imagine the sum total of all the acts of love that all human beings have ever made, throughout their lives [...]. This sum total [...] would contain a true fire of love. Know that all the fires and all the flames of this hearth would not be a tiny spark of the immense love with which the Heart of Jesus burns for us." — Saint John Eudes, The Admirable Heart, book 12 (posthumous publication 1681)^[21]

This is the first great modern formulation of the principle of disproportion between human love — finite, fragile, scattered — and the Love of the Heart of Jesus, which infinitely surpasses every sum of created loves. Saint Thérèse of Lisieux, two centuries later, would turn the same image around to speak of sins: "a drop of water thrown into a blazing fire".

Saint Margaret Mary Alacoque (1647–1690)

Born on 22 July 1647 in Verosvres (Charolais, Burgundy), Margaret Alacoque entered the Monastery of the Visitation of the Blessed Virgin Mary in Paray-le-Monial in 1671. It was between 1673 and 1675 that she received the four great apparitions of the Sacred Heart that would permanently shape Catholic devotion. In religion, she took the name Mary to underscore her union with the Heart of the Mother.

Her life was short (43 years), discreet, marked by fragile health, humiliations within her community, and silent obedience. She was canonized by Benedict XV on 13 May 1920; her feast is set on 16 October. The shrine of Paray-le-Monial has, since the late nineteenth century, become one of the great pilgrimage sites of French Catholicism.

The central words of Jesus

During an apparition recounted in her Autobiography, Jesus shows her His Heart surrounded by a crown of thorns and says to her:

"Behold this Heart which has so loved men, that it has spared nothing, even to exhausting and consuming itself, to give them proofs of its love; and in return, I receive from the greater part of men only ingratitude [...]." — Jesus to Saint Margaret Mary Alacoque, Autobiography, § 92^[22]

And concerning the mission He entrusts to her:

"My divine Heart is so passionately in love with men, and with you in particular, that, no longer able to contain within itself the flames of its burning charity, it must needs pour them out through you, and to make itself known to them, so as to enrich them with its precious treasures which I am revealing to you." — Jesus to Saint Margaret Mary Alacoque, Autobiography, § 53^[23]

The wording matches, astonishingly, word for word, the words that Saint Faustina would record two centuries later — "The flames of My Mercy are burning Me; I desire to pour them out upon souls" (§177) — proof that this is one and the same revelation of the Heart of God.

Saint Claude La Colombière, spiritual director

Margaret Mary's apostolate would no doubt have been stifled without the decisive support of Saint Claude La Colombière (1641–1682), a Jesuit who became her spiritual director from February 1675. He authenticated the apparitions, wrote an Offering to the Sacred Heart, and spread the devotion in England, where he accompanied the Duke of York as chaplain. Beatified in 1929 and canonized in 1992 by John Paul II, he is canonically linked to Saint Margaret Mary: the liturgy unites them under the shared title of "apostles of the Heart of Jesus"^[24].

The twelve promises of the Sacred Heart

From her conversations with Christ and from her letters, tradition has drawn out — without their being formally numbered in her Autobiography — a set of twelve promises made to those who honour His Sacred Heart^[25]. They were arranged in their classic form by the Jesuit Joseph de Gallifet in the early eighteenth century:

1. "I will give them all the graces necessary for their state of life."
2. "I will establish peace in their families."
3. "I will console them in all their troubles."
4. "I will be their assured refuge in life and especially at the hour of death."
5. "I will pour abundant blessings upon all their undertakings."
6. "Sinners will find in My Heart the source and infinite ocean of mercy."
7. "Lukewarm souls will become fervent."
8. "Fervent souls will quickly rise to great perfection."
9. "I will bless the houses in which the image of My Heart is exposed and honoured."
10. "I will give to priests the gift of touching the most hardened hearts."
11. "The names of those who promote this devotion will be written in My Heart and will never be effaced."
12. The "great promise": "I promise you, in the excessive mercy of My Heart, that its all-powerful love will grant to all those who receive Holy Communion on nine first Fridays of the month consecutively the grace of final perseverance; they will not die in My displeasure, nor without receiving their sacraments, My divine Heart being their assured refuge at that last hour."^[26]

The sixth promise is particularly remarkable in light of the theme of this article: Jesus announces at Paray-le-Monial — more than two centuries before Vilnius — that His Heart is "the source and infinite ocean of mercy" for sinners. The word mercy is already at the heart of the revelation of Paray; it will merely be taken up and unfolded by Faustina from 1931 onward.

The devotion of reparation: the Holy Hour and the first Fridays

During the second great apparition (June 1674), Jesus asks Margaret Mary for a devotion of reparation, in response to the ingratitude of men:

"I ask you that on all the nights from Thursday to Friday, I will make you share in this mortal sorrow which I chose to feel in the Garden of Olives [...]. You will rise between eleven and twelve o'clock, to prostrate yourself for one hour with Me, face to the ground, both to appease divine wrath, begging mercy for sinners, and to soften in some way the bitterness which I felt at the abandonment of My apostles." — Jesus to Saint Margaret Mary, Autobiography, § 57^[27]

This is the origin of the practice of the Holy Hour from Thursday to Friday, extended by that of the nine first Fridays of consecutive months, to which the "great promise" is attached. The spiritual theology of the Sacred Heart is therefore not merely affective: it includes an explicit reparative and Eucharistic dimension, which Pius XI would make, in 1928, the proper subject of his encyclical Miserentissimus Redemptor.

Liturgical recognition and papal magisterium

The devotion experienced a gradual spread and then a cascade of papal acts of consecration:

The title, taken from Isaiah 12:3

The encyclical by Pius XII, published on 15 May 1956 for the centenary of the extension to the whole Church by Pius IX of the feast of the Sacred Heart, takes its title from the book of Isaiah:

"You shall draw water with joy from the springs of salvation." — Isaiah 12:3 (Haurietis aquas in gaudio de fontibus Salvatoris)^[28]

This image of the springs of salvation already unifies the Old Testament reading (Isaiah), the Johannine event (the blood and water from the side), and the Marian and liturgical devotion to the open Heart.

A devotion that is not sentimentalism

In it, Pius XII defends the devotion against two modern criticisms: sentimentalism and private piety detached from dogma. He recalls that the Heart of Jesus is legitimately the object of worship of adoration (latria) because it is, in the unity of the Person of the Word, the natural sign of Christ's immense charity towards the human race (in Latin: naturalis index seu symbolus immensae eius caritatis erga hominum genus)^[29].

He also recalls, echoing Pius XI (Miserentissimus Redemptor, quoted in the encyclical: "totius religionis summa, atque adeo perfectioris vitae norma"), that this form of piety contains, as it were in summary, the whole of religion and the rule of a more perfect life^[30]: it reaches the very source of Christianity — God's love for us, and the love we owe to God.

A recapitulative encyclical

On 24 October 2024, Pope Francis published the encyclical Dilexit nos "on the human and divine love of the Heart of Jesus Christ". It is one of the longest documents of his pontificate (220 paragraphs). In it he takes up the magisterial chain of the encyclicals of Leo XIII, Pius XI, Pius XII and Paul VI, and extends it into the contemporary context marked by digital disincarnation and the dictatorship of consumption.

The triple love of the Heart of Jesus

In no. 65, Francis quotes with approval the great synthesis of Pius XII:

In no. 65, Francis describes the triple love represented in the image of the Lord's Heart: the infinite divine love found in Christ, the spiritual dimension of his humanity, and his sensible love^[31].

It is this triple love — divine, spiritual-human, sensible-affective — that justifies the Heart of Jesus being the object of true worship of adoration, without confusion or separation between flesh and divinity.

The rediscovery of the heart

Francis insists on the anthropological dimension: in an age when artificial intelligence and inner fragmentation dissolve the unity of the person, he calls for "rediscovering the importance of the heart"^[32], defined as "the core of every human being, its innermost centre"^[33], which is "not the core of the soul but of the whole person in its unique identity, which is both soul and body".

Saint Faustina Kowalska (1905–1938)

Helena Kowalska, born on 25 August 1905 in Głogowiec (Poland), entered the Congregation of the Sisters of Our Lady of Mercy in 1925, where she took the name Sister Maria Faustina of the Blessed Sacrament. A simple religious — cook, gardener, doorkeeper — she received from 1931 a series of apparitions of Christ that would found the contemporary devotion to Divine Mercy. She died on 5 October 1938 in Kraków. Beatified by John Paul II on 18 April 1993, she was canonized by the same pope on 30 April 2000, the day on which he established Divine Mercy Sunday for the whole Church^[34].

The founding vision: Płock, 22 February 1931

In Płock, on the evening of 22 February 1931, Sister Faustina saw Christ clothed in white:

"In the evening, while I was in my cell, I saw the Lord Jesus clothed in a white garment. One hand was raised in blessing, the other touched the garment at the breast. [...] From the opening of the garment at the breast came forth two great rays, one red, the other pale. [...] After a moment, Jesus said to me: 'Paint an image according to the pattern you see, with the inscription: Jesus, I trust in You. I desire that this image be venerated, first in your chapel, and then throughout the whole world.'" — Saint Faustina, Diary, §47^[35]

Jesus then explained to her the meaning of the two rays:

"The two rays signify the Blood and the Water. The pale ray signifies the Water which justifies souls, the red ray signifies the Blood which is the life of souls... These two rays gushed forth from the depths of My Mercy, when on the Cross, My agonizing Heart was pierced by the lance." — Saint Faustina, Diary, §299^[36]

The reference to John 19:34 is explicit: the devotion to Divine Mercy is not a new devotion, but the contemporary explicitation of the devotion to the open Heart, linked across the centuries to the enigmatic image of Habakkuk 3:4.

Blessed Michał Sopoćko (1888–1975), Faustina's confessor

Without her confessor, Faustina's message would probably have remained buried in her cell. Michał Sopoćko, a priest of the Diocese of Vilnius, professor of pastoral theology at Stefan Batory University, became her spiritual director in the summer of 1933. He had the first painting made by Eugeniusz Kazimirowski under Faustina's direct guidance between January and June 1934; he wrote the first doctrinal expositions of the devotion to Divine Mercy; he would champion the saint's cause after her death, despite the temporary Indexing of the Diary (1959–1978) due to a faulty Italian translation, lifted by Paul VI and above all by John Paul II^[37]. He was beatified in Białystok on 28 September 2008.

The painting and the invocation

The first painting was made in Vilnius by Eugeniusz Kazimirowski under the direction of Blessed Sopoćko, and was first exhibited on Good Friday, 26 April 1935. The invocation "Jesus, I trust in You" (in Polish Jezu, ufam Tobie) sums up the whole devotion. The Chaplet of Mercy, dictated to Faustina between 13 and 14 September 1935 (Diary, §475-476), takes up the Johannine invocation of the open Heart: "O Blood and Water, which gushed forth from the Heart of Jesus as a fount of mercy for us, I trust in You!"^[38].

The "blaze" of Mercy

During the renewal of her vows on 1 May 1933, Faustina heard the decisive words:

"My daughter, look at My merciful Heart. [...] My daughter, tell the priests about My inconceivable Mercy. The flames of My Mercy burn Me; I want to pour them out upon souls, but souls do not want to believe in My goodness." — Jesus to Saint Faustine, Little Diary, §177^[39]

And further on, in the same spirit as the Chrysostomian formula of the drop of water in the ocean: “All your miseries are burned in the fire of My love, like a blade of grass thrown into a devouring blaze”^[40].

The Second Encyclical of the Pontificate (30 November 1980)

Elected on 16 October 1978, John Paul II published as early as 30 November 1980 his second encyclical, Dives in Misericordia, “on divine mercy”. The title is taken from the Letter to the Ephesians:

“God, who is rich in mercy, because of the great love with which he loved us, even when we were dead through our sins, brought us to life with Christ.” — Ephesians 2:4-5^[41]

The encyclical affirms that mercy is not a secondary or “affective” attribute of God, but the very mode by which God's love is revealed in the history of mankind:

“Thus, in Christ and through Christ, God becomes visible in his mercy; that is to say, that attribute of divinity which the Old Testament, through various terms and concepts, had already defined as ‘mercy’ is brought into relief.” — John Paul II, Dives in Misericordia, n. 2^[42]

And further on, citing the theological tradition:

“Theologians affirm that mercy is the greatest of God's attributes, the greatest of his perfections; the Bible, Tradition, and the entire faith life of the People of God provide inexhaustible testimony of this.” — John Paul II, Dives in Misericordia, n. 13^[43]

The Institution of Divine Mercy Sunday

On 30 April 2000, the day of the canonization of Saint Faustine, John Paul II announced that the Second Sunday of Easter would henceforth be celebrated throughout the entire Church under the title of Divine Mercy Sunday. The decree of the Congregation for Divine Worship of 5 May 2000 confirmed this liturgical decision^[44]. It is one of the very rare cases, in recent history, in which a private revelation has thus been received by the universal liturgy of the Church.

Saint John Chrysostom: The Spark in the Ocean

From the earliest centuries, Greek patristics forged the comparisons that would remain classic. Saint John Chrysostom (c. 349–407), in his First Instruction to Catechumens, compares the evil of man to a spark falling into the sea and being extinguished at once, engulfed by the multitude of waters — an image of divine mercy overwhelming sin^[45].

Saint John Marie Vianney: The Grain of Sand and the Mountain

The holy Curé of Ars (1786–1859), the tireless confessor of sinners, used a deliberately homely image when speaking of mercy:

“Our faults are grains of sand beside the great mountain of God's mercies.” — Saint John Marie Vianney, cited in Mgr Trochu, Le Curé d'Ars : saint Jean-Marie-Baptiste Vianney^[46]

Saint Thérèse of Lisieux: The Drop of Water in the Blaze

Saint Thérèse of Lisieux (1873–1897), Doctor of the Church, in turn formulated it in her Last Conversations:

“Even if I had on my conscience every sin that can be committed, I would go, my heart broken with repentience, and throw myself into the arms of Jesus, for I know how much He cherishes the prodigal child who returns to Him. [...] If I had committed every possible crime, I would always have the same trust; I feel that this whole multitude of offences would be like a drop of water thrown into a burning blaze.” — Saint Thérèse of Lisieux, Last Conversations, 11 July 1897, n. 6^[47]

She would also say, a few days before her death: “The Good God is much better than you believe”^[48], a formula that sums up her whole “little way” of trust.

Father Jean d'Elbée: Trust Against Distrust

Father Jean of the Heart of Jesus d'Elbée (1892–1982), a French priest of the Heart of Jesus, gave in his book Croire à l'Amour (Téqui, 1st ed. 1968) a diagnosis that has remained widely read:

“We fashion the Heart of Jesus according to the measure of our miserable little heart, so petty, so narrow, so hard, and we cannot understand that Jesus, for His part, should be so good, so indulgent, so compassionate, so gentle, so patient. We are severe above all through lack of humility. This lack of humility prevents us from going to Jesus with the trust of a child.” — Father Jean d'Elbée, Croire à l'Amour, Téqui, 2007, p. 103-104^[49]

And he puts these words on Christ's lips:

“I have given them everything. I have given them my sweat and my toil on the roads of Palestine; I have given them all my blood on Calvary; I have made them a gift of my beloved Mother; I have given myself in the Eucharist. What more can I do so that they may believe in my Love? I have found it: I will give them my Heart.” — Jesus in the meditation of Father Jean d'Elbée, Croire à l'Amour, Téqui, p. 18-19^[50]

Father d'Elbée's diagnosis — “you do not believe enough in merciful Love” — became one of the leitmotifs of the whole of twentieth-century French spirituality in the wake of Saint Thérèse of Lisieux.

Fire on earth: Luke 12:49-50

The Gospel according to Saint Luke reports a saying of Jesus whose double tone — fire of love and baptism of blood — has been emphasized by the spiritual tradition:

"I came to bring fire on the earth, and how I wish it were already kindled! I must receive a baptism, and what anguish is mine until it is accomplished!" — Luke 12:49-50^[51]

In the following verse — "what anguish is mine" — the Greek word synéchomaï literally means "I am pressed, constrained, oppressed": it is the inner urgency of a heart that longs to pour itself out and cannot yet do so.

The double meaning of the word "passion"

The French word passion covers two realities that the spirituality of the Sacred Heart unites into one. It denotes, on the one hand, an extreme love, a keen inclination — one says of a scholar that he is "passionate" about his subject. It denotes, on the other hand, suffering — the Passion of Christ. Now, for the Catholic mystical tradition, these two senses are but a single reality in God: because Love is extreme, it becomes suffering when the beloved refuses. This is what Jesus himself suggested in the passage from Luke — fire of love and bloody baptism — and what Sister Josefa Menendez heard in plain words:

"I will teach sinners that the Mercy of my Heart is inexhaustible; to cold and indifferent souls, that my Heart is a Fire that longs to set them ablaze, because it loves them." — Jesus to Sister Josefa Menendez, Un Appel à l'Amour, p. 416^[52]

"Our God is a consuming fire" (Heb 12:29)

The Epistle to the Hebrews takes up the Old Testament image and applies it to the Trinitarian mystery:

"Our God is a consuming fire." — Hebrews 12:29 (citing Deuteronomy 4:24)^[53]

This "consuming fire" is not, in the Christian reading, a fire of wrath but the fire of charity that consumes everything that cannot abide in the presence of God. Classical spiritual theology — from Saint Augustine to Saint Catherine of Genoa — makes purgatory itself a plunge into this fire of Love^[54]. All the more so, then, is the encounter with the Heart of Jesus, here below, an exposure to this fire that "longs to set them ablaze" (Faustine, §556).

"My love feeds on consuming miseries"

Several modern mystics converge in saying that God's Love for man is such that it feeds even on our miseries in order to consume them. Sister Benigna Consolata Ferrero (1885-1916), a Visitation nun in Como and Servant of God (cause for beatification opened in 1923, not beatified), records the most striking formula:

"My love feeds on consuming miseries, and the soul that brings me the most of them, provided it be with a contrite and humbled heart, is the one that pleases me most, because she gives me more occasion to exercise my office of good Savior. As fire feeds on combustibles, so my Mercy feeds on miseries that it consumes, and the more it finds to consume, the more it grows, exactly as fire grows as one throws materials upon it." — Jesus to Sister Benigna Consolata Ferrero, Extraits d'une notice de sa vie, 1918, p. 9^[55]

And further on, in the same notice:

"Write, O my Benigna, apostle of my mercy, write that the chief thing I desire to be known is that I am all love, and that the greatest pain one could inflict upon my Heart would be to doubt its goodness." — Jesus to Sister Benigna Consolata Ferrero, Notice, 1918^[56]

Little Brother Van: "grains of dust"

Marcel Van (1928-1959), Vietnamese Redemptorist little brother, who died in a communist camp in North Vietnam on 10 July 1959, receives from the lips of Christ one of the sweetest sayings of contemporary spirituality:

"Your weaknesses are but grains of dust which, passing through the fire of my love, vanish without leaving any trace... These weaknesses, offer them to me so that I may use them to feed the fire of my love in your heart." — Jesus to Marcel Van, Colloques, Amis de Van, 2017, p. 74^[57]

More striking still, Jesus confides to him his own surprise at the fear souls feel toward him:

"I myself find this strange, and I do not understand why so many souls are thus afraid of me. [...] They are afraid because they want to be afraid, for I do nothing that is of a nature to frighten anyone. And if ever my love wanted to sow terror among men, it would no longer deserve the name of 'Love.'" — Jesus to Marcel Van, Colloques, Amis de Van, 2017^[58]

This is the clearest admission of the superabundance of the Heart of Jesus: it is not he who holds back, it is we who do not believe.

The suffering of a Love unrequited: Luisa Piccarreta

The writings transmitted by Luisa Piccarreta (1865-1947) — Servant of God: the Dicastery for the Doctrine of the Faith granted its Nulla Osta in June 2024 for the continuation of her cause for beatification, confirmed by letter of 3 December 2024 — offer a particularly penetrating analysis of the suffering of this burning Love that finds no response. For those discovering her: the Book of Heaven reports what Jesus told her; the saints, he explains, did his Will, while living in his Will is to possess it as a son possesses what belongs to the Father^[59]. Jesus tells her:

"My daughter, true love needs to pour itself out. [...] My Heart is in the ardor of flames. [...] And my contained Love groaned, raved, devoured by inextinguishable flames." — Jesus to Luisa Piccarreta, The Book of Heaven, vol. 26, 31 May 1929^[60]

And further on, on the priority of Love over suffering in the Passion of Christ:

"My daughter, my first martyrdom was Love, which gave birth to my second: suffering. Each of my Sufferings was preceded by a sea of Love. When my Love saw itself alone and abandoned by the majority of creatures, It became delirious. Finding no one to give Itself to, It concentrated within Itself. This caused Me such suffering that, by comparison, my other sufferings were reliefs." — Jesus to Luisa Piccarreta, The Book of Heaven, vol. 12, 2 September 1920^[61]

The distinction is precious: the first martyrdom of Christ is Love that sees itself refused; the whips, the thorns and the nails come afterwards. What Jesus suffered in his Heart is deeper than what he suffered in his flesh.

The language is anthropomorphic — God, being unchangeable, does not "suffer" as we suffer — but it states with precision the experiential truth of a divine will that freely exposes itself to the refusal of the creature and, in the humanity of Christ, feels its wound. This pain of the Heart of Jesus is precisely what motivates the reparative devotion associated with the Sacred Heart since Paray-le-Monial and codified by Pius XI in Miserentissimus Redemptor.

Two Devotions, One Open Heart

The spiritual tradition, following here the teaching of John Paul II and Francis, refuses to set the devotion to the Sacred Heart against that of Divine Mercy: it is one single spiritual reality, contemplated according to two historical moments and from two complementary angles.

Unity in the Blood and the Water

On the biblical level, the two devotions trace back to the same verse: John 19:34. The blood honoured by the devotion to the Sacred Heart is the same as the red ray of Faustina's painting; the water, in which the Fathers of the Church read the source of baptism, is the same as the pale ray. This is why the Chaplet of Mercy — entirely centred on the invocation "Eternal Father, I offer You the Body and the Blood, the Soul and the Divinity of Your dearly beloved Son" — is not a deviation from Eucharistic devotion: it is its contemplative prolongation.

The Shared Doctrinal Heritage

Pope Francis explicitly underscores this unity in Dilexit nos: there he places the devotion to the Heart of Christ within a single chain running from Saint Margaret Mary to Saint Faustina — who "proposes anew the devotion to the Heart of Christ, placing strong emphasis on [...] divine mercy" (no. 149) — and then to Saint John Paul II and Haurietis aquas (no. 80–87)^[62]. Far from replacing the ancient devotion, Divine Mercy reawakens it for an age that doubts en masse that it can still be loved and forgiven.

The Pastoral Diagnosis

All the mystical voices summoned by the tradition converge on the same pastoral observation: the sinner suffers less from his sins than from his distrust. This is precisely the suffering that Faustina denounces in the name of Christ: "I want to pour them out upon souls, but souls do not want to believe in My goodness"^[63].

Father d'Elbée draws from this a deliberately shocking but accurate formula:

"A sin of distrust offends and grieves Jesus more than a hundred sins of weakness." — Father Jean d'Elbée, Croire à l'Amour, Téqui^[64]

And this is exactly what the Eternal Father says to Saint Catherine of Siena in her Dialogue:

"To judge one's misery to be greater than My mercy — that is the sin which is forgiven neither in this world nor in the next. She has rejected and despised My mercy; and this sin is greater than all the others she has committed. The despair of Judas offended Me more and was more painful to My Son than his betrayal itself." — Catherine of Siena, Dialogue, ch. 37^[65]

The Right Proportion

To restore the right proportion between fault and mercy, Catholic spirituality offers the troubled soul a threefold cumulative comparison — spark / ocean (Chrysostom); grain of sand / mountain (Vianney); drop of water / blazing fire (Thérèse). In all three cases, the fault is finite, mercy is infinite, and their encounter can only turn out in favour of mercy, provided the soul lets itself be reached.

The Pedagogy of Childhood

This is what both Saint Thérèse — the "little way" of childhood — and Father d'Elbée — "believe in Love" — summarize, and what Pope Francis repeats in his own way by calling us to "rediscover the importance of the heart"^[66].

Go deeper with Via Divina — To continue this theme in a structured spiritual journey on God's infinite love and the trust it calls for, open the Via Divina formation.

• The Infinite Love of God in Creation — first abyss of the Love of God.
• The Infinite Love of God in Redemption — second abyss.
• The Infinite Love of God in the Eucharist — third abyss (previous lesson).
• The knowledge of the Love of God, which produces trust — next lesson.
• Sacred Heart of Jesus — dedicated article.
• Saint Faustina Kowalska (1905-1938) — full biography.
• Sanctuary of the Divine Mercy in Krakow — dedicated article.
• God of Justice and Mercy — theological synthesis.