According to the words of Christ through His apparitions to Saint Margaret Mary Alacoque, there are several promises to those that practice the First Friday Devotions:
“In the excess of the mercy of my Heart, I promise you that my all powerful love will grant to all those who will receive Communion on the First Fridays, for nine consecutive months, the grace of final repentance: they will not die in my displeasure, nor without receiving the sacraments; and my Heart will be their secure refuge in that last hour.”
The devotion consists of several practices that are performed on the first Fridays of nine consecutive months. On these days, a person is to attend Holy Mass and receive communion. If the need arises in order to receive communion in a state of grace, a person should also make use of the Sacrament of Penance before attending Mass. In many Catholic communities the practice of the Holy Hour of meditation during the Exposition of the Blessed Sacrament during the First Fridays is encouraged.