CCC 1274

The Holy Spirit has marked us with the seal of the Lord ("Dominicus character") "for the day of redemption." St. Augustine, Ep. 98, 5: PL — Patrologia Latina (Migne); Eph 4:30; cf. 1:13-14; 2 Cor 1:21-22. "Baptism indeed is the seal of eternal life." St. Irenaeus, Dem ap. 3: SCh — Sources Chrétiennes (patristic critical-edition series). The faithful Christian who has "kept the seal" until the end, remaining faithful to the demands of his Baptism, will be able to depart this life "marked with the sign of faith," Roman Missal, EP — Eucharistic Prayer (Roman Missal) I (Roman Canon) 97. with his baptismal faith, in expectation of the blessed vision of God - the consummation of faith - and in the hope of resurrection.

Read the full chapter 1. The Sacraments of Christian Initiation ¶1212–1419