CCC 1224

Our Lord voluntarily submitted himself to the baptism of St. John, intended for sinners, in order to "fulfill all righteousness." Mt 3:15. Jesus' gesture is a manifestation of his self-emptying. Cf. Phil 2:7. The Spirit who had hovered over the waters of the first creation descended then on the Christ as a prelude of the new creation, and the Father revealed Jesus as his "beloved Son." Mt 3:16-17.

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