John 3:12-15

12If I have said the earthly things to you, and ye believe not, how, if I say the heavenly things to you, will ye believe?

13And no one has gone up into heaven, save he who came down out of heaven, the Son of man who is in heaven.

14And as Moses lifted up the serpent in the wilderness, thus must the Son of man be lifted up,

15that every one who believes on him may [not perish, but] have life eternal.