He travels to the River Jordan, where his cousin, John the Baptist, has been doing the work of preparing the way for Christ's coming by proclaiming a baptism of repentance for the forgiveness of sins.
John calls on people to repent of their sins, and to change their lives. He preaches that the hour is growing late, warning people to "Repent, for the kingdom of Heaven is close at hand." He then baptizes with ritual immersion in water as not just a sign that you are sorry, but as a whole change of life.
John has also been proclaiming that he himself is no one special, but that soon will come one greater than he, one who will baptize people not with water, but with fire and the Holy Spirit. It is Jesus about whom John speaks, and soon enough the day comes when his proclamations will turn to reality.
One day, while continuing his work of baptizing the usual array of sinners: ordinary folk, prostitutes, tax collectors, soldiers, and even clergy, suddenly Jesus appears in their midst, demanding to be baptized. John hesitates, saying that it is Jesus who should be baptizing him. But the Lord insists, and John proceeds with the ceremony.
At it's conclusion, as Jesus raises from the water, the sky parts, God's glory shines down upon the scene, and a dove descends, coming to rest on the Lord. God's voice is heard by all: "This is my Son, the Beloved; my favor rests on him."
Why did Jesus insist on his being baptized by John, when quite obviously as the Son of God, he could indeed have insisted just the opposite? His own words tell the story. In responding to John's incredulity, Jesus said: "Leave it like this for the time being; it is fitting that we should, in this way, do all that uprightness demands."
