Jesus was baptized too, Holy Spirit descended on him in bodily form like a dove

Luke 3:15-22
The people were waiting expectantly and were all wondering in their hearts if John might possibly be the Messiah.  John answered them all, “I baptize you with water. But one who is more powerful than I will come, the straps of whose sandals I am not worthy to untie. He will baptize you with the Holy Spirit and fire.
When all the people were being baptized, Jesus was baptized too. And as he was praying, heaven was opened and the Holy Spirit descended on him in bodily form like a dove. And a voice came from heaven: “You are my Son, whom I love; with you I am well pleased.
Only Luke says that it was as Jesus was praying that a dove-like form was seen and God's voice heard.
Heaven opened: meaning that what followed is a revelation from God.
A dove became the symbol of the Holy Spirit for Christians. For Jews it stood for Israel.
Why?
Jesus different with John is Jesus baptize with Holy Spirit and fire, John baptize with water.
It is shown that Jesus is son of God when Jesus was baptized by John. There were Holy Spirit and voice from heaven.
People wondering if John might possibly be the Messiah, but John said to them no. There is one who powerful than I will come.
The mission of John was done, for Jesus is come. John let people know Jesus is the Messiah.
God, Jesus and Holy Spirit come together when Jesus was baptized.
How?
Be a honest missionary of the Lord, not pursue my profit but profit of the Lord.