"Jesus came [...] to John, to be baptized by him. John would have prevented him, saying, "I need to be baptized by you, and do you come to me?" [...]
And when Jesus was baptized, he went up immediately from the water, and behold, the heavens were opened and he saw the Spirit of God descending like a dove, and alighting on him; and lo, a voice from heaven, saying, "This is my beloved Son, with whom I am well pleased." (Matthew 3, 13-17).
The Baptism of Jesus opens his public life. Jesus de Nazareth is descended in the Jordan with the sinners, but when he goes up river, God the Father reveals that he is his beloved Son, and the Holy Spirit expresses, while resting on him, that he is the anointed of the Lord, the Christ.
John Baptist can testify: "He is him the Son of God". But John can also say that he is "that which removes the sin of the world". Indeed, the baptism of Jesus is not only the demonstration of his divinity, it "reveals us the new baptism". Jesus is descended in water to sanctify it. From now on those which will be born again "of water and Spirit" by the baptism and the Confirmation will become adoptive sons of God.
With the baptism of Jesus, the heaven opened; the Spirit, like a dove, rested on him, the voice of the Father was made hear: ""This is my beloved Son, with whom I am well pleased" " (Matthew 3, 17).
