Q. In the gospel of John, when Jesus is speaking with Nicodemus, why does he liken Himself to the serpent that was lifted up in the desert in the Old Testament, considering that serpents are usually associated with Satan? Why was a serpent chosen as a type/foreshadowing of what Jesus would do on the cross, especially in light of the Bible always emphasizing the “lamb” that was slain? I’ve thought that perhaps in a sense sin/evil was on the cross since Jesus “became sin” to put an end to it, but other than that it just seems weird to me.
Jesus refers to the way Moses made a bronze serpent and put it up on a pole in order to make one specific point to Nicodemus. Jesus has just told him that he needs to be “born again” in order to enter the kingdom of God. Nicodemus has misunderstood this and thinks that Jesus is describing something physical rather than something spiritual. (This happens often in Jesus’ conversations with people in this gospel, as I explain in my study guide to John.) “How can someone be born when they are old?” Nicodemus asks.
Jesus tries to explain that he’s talking about being “born of the Spirit,” but Nicodemus still asks, “How can this be?” So Jesus uses the episode of the bronze serpent to explain more precisely what he means by being “born again.”
This episode is related in the book of Numbers. The Israelites are traveling through the wilderness and they start complaining about the very manna that God has been providing miraculously to feed them in the desert. (They say, “We detest this miserable food!”) As a punishment for their ingratitude, God sends poisonous snakes among them and many of the Israelites start dying from snake bites. So they come to Moses and admit, “We sinned when we spoke against the Lord and against you.” They ask him to “pray that the Lord will take the snakes away from us.” God forgives the people and tells Moses to make a bronze snake and put it up on a pole.” God promises, “Anyone who is bitten can look at it and live.”
In other words, an admission of sin and a response of hopeful faith, looking to the means God provided for deliverance, was how the Israelites could be rescued from physical death in this instance. Jesus is telling Nicodemus that the same thing will be true, on a much grander scale in the spiritual realm, when he is “lifted up” onto the cross. Anyone who is sincerely sorry for the way they’ve disobeyed and offended God, and who looks in hopeful faith to Jesus’ death on the cross for their sake, will be rescued spiritually and given the chance to live anew. This is what it means to be “born again.”
So that is the single point of comparison: just as the Israelites needed to look in hopeful faith to God’s provision for their physical deliverance in the wilderness, so Nicodemus (and anyone else, ever since, who hears about Jesus’ conversation with him) needs to look in hopeful faith to God’s provision for their spiritual deliverance in the form of Jesus’ death on the cross.
We should not make any further points of comparison, such as “Jesus must be like a serpent in some way, rather than a lamb, because he said he had to be lifted up just as the serpent was lifted up.”
However, we should keep in mind that in the gospel of John, there are always multiple levels of meaning at work. Behind physical references there is often spiritual significance. We’ve already seen that this is true when Jesus speaks about being “born,” and it’s also true when he speaks of himself being “lifted up.” This can mean simply being raised onto the cross, but as a footnote in the NIV explains each time this phrase occurs in John, “The Greek for lifted up also means exalted.” We need to recognize that this spiritual meaning is also in view when Jesus says things like, “When I am lifted up from the earth, I will draw all people to myself.”