Please read this passage before the commentary.
The Scriptures tell us that John the Baptist baptized Jesus in the Jordan River, but none of the gospel writers describe the actual baptism. What was important was not the ritual John used, but the fact that John did the baptizing and that what happened did happen. What did happen? Mark describes the become God?” The answer is as being torn open, the Spirit like a dove descending on Jesus, and the voice of the Father declaring Jesus as God’s beloved Son.
The arrangement of the elements of the story answers the question, “When did Jesus become God?” The answer is “From the very beginning”. When Mark introduces Jesus for the first time, it is at Jesus’ baptism. The Spirit descended upon Jesus and the voice of the Father declared Jesus his Son. The other three gospel writers tell the same story, that Jesus is God’s Son, a divine person, from the very beginning of his public life. Matthew and Luke tell stories from Jesus’ infancy and childhood that show that Jesus was God from the first moment of his conception in his mother’s womb. The story of Jesus’ baptism affirms the truth of who Jesus is, God’s Son in a human body.
There is more. John tells us that Jesus will baptize with the Holy Spirit. That one on whom the Holy Spirit descends is a son/daughter of God. Jesus has baptized us with the Holy Spirit; we so that are, therefore, children of God and Jesus is our brother. God is therefore well pleased with us.
We need to hear this because, often we receive messages that tell us how big and bad sinners we are. The truth is that when God created the universe, God had already decided to send us Jesus so that with God-among-us in human form God could teach us how we are supposed to live as human beings, both in relation to God and in relation to other human beings and all creation. God looks upon the ones on whom the Spirit has descended, and God says, “In them I am well pleased.”
With you, therefore, God is well pleased.