"And He showed me that it was His great desire of being loved by men and of withdrawing them from the path of ruin into which Satan hurls such crowds of them, that made Him form the design of manifesting His Heart to men, with all the treasures of love, of mercy, of grace, of sanctification and salvation which it contains, in order that those who desire to render Him and procure for Him all the honor and love possible, might themselves be abundantly enriched with those divine treasures of which this Heart is the source.
He should be honored under the figure of this Heart of flesh, and its image should be exposed...He promised me that wherever this image should be exposed with a view to showing it special honor, He would pour forth His blessings and graces. This devotion was the last effort of His love that He would grant to men in these latter ages, in order to withdraw them from the empire of Satan which He desired to destroy, and thus to introduce them into the sweet liberty of the rule of His love, which He wished to restore in the hearts of all those who should embrace this devotion."..... "The devotion is so pleasing to Him that He can refuse nothing to those who practice it."
--from Revelations of Our Lord to St. Margaret Mary Alacoque