Saint Margaret Mary Alacoque is attributed with establishing the devotion to the Sacred Heart of Jesus.She endured many afflictions throughout her young life and dedicated her life to Jesus. She entered the Order of the Visitation, which was founded for people who felt a call to the religious life, but were too physically infirm to enter an austere order.

Throughout her life, she had many visions of Jesus. Her confessor did not believe her, even though she spoke of these visions, each time she had one. Finally, as a test, she was told by her confessor to ask Jesus what his sins were, when he made his last confession. During the next vision, St. Margaret Mary relayed the priest’s question to Jesus. Jesus told her he did not remember, because after the sacrament of confession, sins are forgiven and forgotten by Him. They are no longer remembered. The priest knew by this answer that indeed, she had been visited by Christ.

During one of these visitations, she received The Twelve Promises of Jesus for those devoted to His Sacred Heart:

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. They shall find in My Heart an assured refuge during life and especailly at the hour of their death.
5. I will pour abundant blessings on all their undertakings.
6. Sinners shall find in My Heart the source of an infinite ocean of mercy.
7. Tepid souls shall become fervent.
8. Fervent souls shall speedily rise to great perfection.
9. I will bless the homes where an image of My Heart shall be exposed and honored.
10. I will give to priests the power of touching the most hardened hearts.
11. Those who propagate this devotion shall have their names written in My Heart, never to be effaced.
12. The all-powerful love of My Heart will grant, to all those who shall receive Communion on the first Friday of nine consecutive months, the grace of final repentance; they shall not die under My displeasure, nor without receiving their sacraments; My Heart shall be their assured refuge at that last hour.

“Look at this Heart which has loved men so much, and yet men do not want to love Me in return. Through you My divine Heart wishes to spread its love everywhere on earth.”

Prayer to St. Margaret Mary:

Saint Margaret Mary, thou who wast made a partaker of the divine treasures of the Sacred Heart of Jesus, obtain for us, we beseech thee, from this adorable Heart, the graces we need so sorely. We ask these favors of thee with unbounded confidence. May the divine Heart of Jesus be pleased to bestow them upon us through thy intercession, so that once again He may be loved and glorified through thee. Amen.
V. Pray for us, O blessed Margaret;
R. That we may be made worthy of the promises of Christ.
Let us pray.
O Lord Jesus Christ, who didst wondrously open the unsearchable riches of Thy Heart to blessed Margaret Mary, the virgin: grant unto us, by her merits and our imitation of her, that we may love Thee in all things and above all things, and may be worthy to have our everlasting dwelling in the same Sacred Heart: who lives and reigns world without end. Amen
Because after the sacrament of confession, sins are forgiven and forgotten by Him.