And Moses made a serpent of bronze, and put it upon a pole, and it came to pass, that if a serpent had bitten any man, when he beheld the serpent of bronze, he lived.
All Commentaries on Numbers 21:9 Go To Numbers 21
Gregory the Theologian
AD 390
That brazen serpent was hung up as a remedy for the biting serpents, not as a type of him that suffered for us but as a contrast. It saved those that looked upon it, not because they believed it to live but because it was killed, and killed with it were the powers that were subject to it, being destroyed as it deserved. And what is the fitting epitaph for it from us? “O death, where is your sting? O grave, where is your victory?” You are overthrown by the cross. You are slain by him who is the giver of life. You are without breath, dead, without motion, even though you keep the form of a serpent lifted up high on a pole.