Devotion to the Sacred Heart of Jesus is as old as the Church itself. From the moment that the soldier’s spear opened the side of Jesus Christ hanging in death upon the Cross – a moment immortalized by Saint John the Apostle in his Gospel – the small band of faithful souls standing by in mournful silence gave witness to the sacrificial death of the Redeemer as they looked up into that pierced, stilled, emptied Heart. "Exinanivit semetipsum" Saint Paul says: "He emptied Himself." In that Sacred Heart was conceived the Church, and from that open Heart the Church was born. All of her faithful souls throughout the ages continually return to that instant of the opening of Christ’s side on the Cross in their prayers and meditations to draw strength and refreshment for their souls from that fountain of living waters.

The Heart of Jesus is the greatest emblem of Divine Love, But it is also much more than a symbol. While praying the Litany of the Sacred Heart, we say "Heart of Jesus, substantially united to the Word of God!" Some translations render this: "Heart of Jesus, hypostatically united to the Word of God!" Hypostatically (from Greek) and substantially (from Latin) mean essentially the same thing: they refer to the fact that the Sacred Heart is the Heart of a Divine Person, the Son of God. This is God’s Own Heart! It is more than a counterpart to the crucifix. The crucifix shows the outward, visible wounds of Our Lord; the image of the Sacred Heart focuses on His interior sufferings – the agony and the anguish He suffered for us.

The "new order" seeks to replace devotion to the Sacred Heart with a devotion to the Divine Mercy. While the Divine Mercy is certainly worthy of adoration, nonetheless this devotion is used by the Modernists to suit their purposes. Mankind needs to hear about God’s justice and man’s injustice; not presumption on God’s all-forgiveness but the grace of repentance. That is the meaning of devotion to the Sacred Heart of Jesus.

Twelve promises of Our Lord to St. Margaret Mary concerning those who are devoted to His Most Sacred Heart

1. I will give them all the graces necessary in their state of life.
2. I will establish peace in their homes.
3. I will comfort them in all their afflictions.
4. I will be their secure refuge during life and, above all, in death.
5. I will bestow great blessings upon all their undertakings.
6. Sinners shall find in My Heart the source and infinite ocean of mercy.
7. Tepid souls shall grow fervent.
8. Fervent souls shall quickly mount to high perfection.
9. I will bless every place where a picture of My Heart will be set and honored.
10. I will give to priests the gift of touching the most hardened of hearts.
11. Those who promote this devotion shall have their names written in My Heart, never to be effaced.
12. I promise thee, in the abundant mercy of My Heart, that My all-powerful love will grant to all those who receive Holy Communion on the first Friday of nine consecutive months the grace of final penitence; they shall not die in My disfavor nor without receiving the sacraments; My Divine Heart will be their sure refuge in their last moment.