Catechesis: Ap XXIV THE MASS

A sacrament is a ceremony or act in which God offers us the content of the promised joined to the ceremony; thus Baptism is not an act which we offer God but one in which God baptizes us through a minister functioning in His place.—Ap. XXIV:18

There are two, and only two, types of sacrifice. One is the propitiatory sacrifice; this is a work of satisfaction for guilt and punishment that reconciles God or places His wrath and merits the forgiveness of sins for others. The other type is the eucharistic sacrifice: this does not merit forgiveness of sins or reconciliation, but by it those who have been reconciled give thanks or show their gratitude for the forgiveness of sins and other blessings received.—Ap XXIV:29