John 3:13 ASV

¹¹  Verily, verily, I say unto thee, We speak that which we know, and bear witness of that which we have seen; and ye receive not our witness.

¹²  If I told you earthly things and ye believe not, how shall ye believe if I tell you heavenly things?

¹³  And no one hath ascended into heaven, but he that descended out of heaven, 'even' the Son of man, who is in heaven.

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

¹⁵  that whosoever believeth may in him have eternal life.