Appearing to St. Margaret Mary Alacoque, Our Lord asked that, in reparation for the ingratitude of men, He be honored for His love under the emblem of His human heart. He made twelve specific promises of reward for such honor. In particular, "To those who will go to Communion on the First Friday of the month, during nine consecutive months, I promise the grace of final perseverance."
—From the Maryknoll Missal, 1957 edition
The 12 Promises of Our Lord to St. Margaret Mary Alacoque Regarding Those Who Receive Communion on Nine First Fridays
The sacred heart of Christ is an inexhaustible fountain and its sole desire is to pour itself out into the hearts of the humble so as to free them and prepare them to lead lives according to his good pleasure.
"From this divine heart three streams flow endlessly. The first is the stream of mercy for sinners; it pours into their hearts sentiments of contrition and repentance. The second is the stream of charity which helps all in need and especially aids those seeking perfection in order to find the means of surmounting their difficulties. From the third stream flow love and light for the benefit of his friends who have attained perfection; these he wishes to unit to himself so that they may share his knowledge and commandments and, in their individual ways, devote themselves wholly to advancing his glory."
—Saint Margaret Mary Alacoque