The Catechism in Questions & Answers

129. What preceded Jesus’ teaching activity?

Jesus allowed Himself to be baptised by John the Baptist in the Jordan. Immediately following His baptism by John, the Holy Spirit descended visibly upon Jesus. In a voice from heaven, God, the Father, then testified: “You are My beloved Son; in You I am well pleased” (Luke 3: 22). Through this event it was announced to the world that Jesus is the Son of God.