Catechism of the Catholic Church

There is no limit or measure to this essentially divine forgiveness, whether one speaks of "sins" as in Luke (11:4), or "debts" as in Matthew (6:12). We are always debtors: "Owe no one anything, except to love one another." The communion of the Holy Trinity is the source and criterion of truth in every relationship. It is lived out in prayer, above all in the Eucharist. (1441) > God does not accept the sacrifice of a sower of disunion, but commands that he depart from the altar so that he may first be reconciled with his brother. For God can be appeased only by prayers that make peace. To God, the better offering is peace, brotherly concord, and a people made one in the unity of the Father, Son, and Holy Spirit.