One of the most popular Marian devotions in the Catholic Church today is that of the Immaculate Heart of Mary, often honored alongside the Sacred Heart of Jesus. This devotion has its roots in Sacred Scripture, which makes frequent mention of Mary’s contemplative heart, for example in Luke 2:19:
“But Mary treasured all these words and pondered them in her heart.”According to Catholic doctrine, Mary is the Immaculate Conception; that is, in preparation for the Incarnation of the Second Person of the Holy Trinity in her womb, Mary was conceived without the corruption of original sin, and was preserved from committing any actual sins throughout the course of her life through the infinite merits of her Son, Jesus Christ. She was virginal not only of soul, but also of body, both before and after giving birth to Our Lord.
Our Lady was created literally “Full of Grace” as the Archangel Gabriel declared at the Annunciation, meaning that her soul was literally adorned with all of the virtues at the moment of her conception, as well as all the gifts and fruits of the Holy Spirit.
This fullness of grace is said to emanate from the center of her being—her heart—understood both physically and spiritually. It is Mary’s heart, in its unspoiled created perfection, that is the source and wellspring of her purity . . . therefore her heart is called Immaculate.
Our Lord took His sacred humanity from the flesh and blood of his Blessed Mother; Christ’s heart is taken from her heart. At Calvary, the perfect hearts of Jesus and Mary were united for the salvation of mankind. And this is why the Two Hearts are honored together.
While the Sacred Heart of Jesus is the source of Christ’s burning love for humanity, and is largely spurned by the indifference of mankind towards Him, the Immaculate Heart of Mary is the source of Our Lady’s burning love for God and her desire to bring souls to her Son, and is so often outraged by the offenses of mankind committed against her love.
Over the centuries, as the saints and theologians reflected on what it means for Our Lady to have pondered and treasured the sacred events from the life of Jesus in her heart, as attested in Scripture, Mary’s heart began to be recognized as something to be imitated in daily practice.
Devotion to Mary’s holy heart then developed, in much the same way as it did for the Sacred Heart, which was physically pierced by the lance on the Cross to give Eternal Life to men. So also does Mary’s heart, which was also pierced (as prophesied by Simeon) in union with her Son, give life—that is, grace—to the Christian soul.
Beginning in the Middle Ages, this devotion to Our Lady’s purity of heart began to flower, culminating in St. John Eudes actively promoting the devotion in the 17th century alongside that of the Sacred Heart of Jesus. He also worked to have a feast established for the Immaculate Heart of Mary, beginning in his native France.
After the 1830 apparition of the Blessed Virgin Mary in Paris, which gave rise to the Miraculous Medal, efforts were renewed to have devotion to the Immaculate Heart instituted as a feast for the universal Church. In this Marian apparition, Our Lady showed St. Catherine Laboure an image of a medal to be struck which would obtain many graces for those who wore it faithfully, especially the grace of conversion for sinners.
On the front of the medal was an image of Our Lady encircled with the words, O Mary, Conceived Without Sin, Pray for Us Who Have Recourse to Thee, confirming the dogma of her Immaculate Conception. One the reverse was an image of the Cross of Christ surmounted by the letter “M”, and underneath it the symbols of Sacred Heart of Jesus and Immaculate Heart of Mary side-by-side, thus confirming the devotion to her holy heart.
The spreading popularity of the Miraculous Medal soon gave rise to a Marian confraternity based on her Immaculate Heart and her power to convert sinners. The Notre-Dame-des-Victoires of the Archconfraternity of the Immaculate Heart of Mary, Refuge of Sinners was established in Paris in 1836 and quickly spread all over the world, with many graces, especially the conversion of sinners, obtained as a result. Then, in 1855, the feast of the Immaculate Heart of Mary (or Most Pure Heart of Mary) was approved by the Vatican, however, without establishing it for the universal Church.
Devotion to the Immaculate Heart of Mary rose to a new level after the apparitions of Our Lady of Fatima. In her visitations to Lucia, Jacinta, and Francisco, Our Lady revealed a vision of her Immaculate Heart encircled with thorns which represented the many sins committed against her. At Fatima, Our Lady asked for Russia to be consecrated to her Immaculate Heart in order to prevent many calamities from occurring in the Church and throughout the world.