And as Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up:
All Commentaries on John 3:14 Go To John 3
Augustine of Hippo
AD 430
Many dying in the wilderness from the attack of the serpents, Moses, by commandment of the Lord, lifted up a brazen serpent and those who looked upon it were immediately healed. The lifting up of the serpent is the death of Christ; the cause, by a certain mode of construction, being put for the effect. The serpent was the cause of death, inasmuch as he persuaded man into that sin, by which he merited death. Our Lord, however, did not transfer sin, i.e. the poison of the serpent, to his flesh, but death; in order that in the likeness of sinful flesh, there might be punishment without sin, by virtue of which sinful flesh might be delivered both from punishment and from sin.
As then formerly he who looked to the serpent that was lifted up, was healed of its poison, and saved from death; so now he who is conformed to the likeness of Christ’s death by faith and the grace of baptism, is delivered both from sin by justification, and from death by the resurrection: as He Himself said; That whosoever believes in Him should not perish, but have everlasting life. What need then is there that the child should be conformed by baptism to the death of Christ, if he be not altogether tainted by the poisonous bite of the serpent? .
But there is this difference between the figure and the reality, that the one recovered from temporal death, the other from eternal.