John 1:32

Then John gave this testimony: “I saw the Spirit come down from heaven as a dove and remain on him. I would not have known him, except that the one who sent me to baptize with water told me.

The Holy Spirit did also manifest it self in the flesh on Earth. It came from Heaven, and settle on Jesus in the form of a dove. John the Immerser was a cousin of the carpenters son from Nazareth. It is wort noticing that even John did not recognize Jesus by looks or talk during their youth, neither when the dove rested on the Messiah. It had to be revealed also to John from above.