John 6:38

For I am come down from heaven, not to do mine own will, but the will of him that sent me.

A bolder statement of the virgin birth of Christ cannot be imagined than this offhand, factual statement from the lips of Christ: "I am come down from heaven." From first to last John stresses the eternal existence of Christ and his prior residence in heaven, the virgin birth being an inescapable corollary. How else, pray tell, could God have entered our earth-life as a man?

Not to do mine own will, but the will of him that sent me ... Jesus' absolute submission to the Father's will is stressed throughout John. Jesus did not even speak from himself but delivered the words God commanded him to speak (John 12:48,49).