What does the Bible say about the serpent on the pole?

In John 3:14-15, Jesus references the event described in Numbers 21:1-9, where Moses lifted a serpent on a pole to heal the Israelites who had been bitten by poisonous snakes. This act symbolizes the necessity of Christ's crucifixion, where He would be lifted up to provide salvation. Just as the Israelites were saved by looking at the serpent, we are saved by looking to Christ, who bore our sins. This illustrates the principle that faith in Him is essential for eternal life, drawing a direct line between the Old Testament foreshadowing and New Testament fulfillment.