What does the Bible say about the brazen serpent?

The brazen serpent lifted up by Moses serves as a profound type and shadow of Christ’s redemptive work. In John 3:14-15, Jesus explains to Nicodemus that just as Moses lifted up the serpent in the wilderness, so must the Son of Man be lifted up, signifying His impending crucifixion. This act provided a means of salvation for the Israelites, who, by simply looking at the serpent, were healed from their deadly snake bites that had resulted from their sin against God. In this way, looking at the brazen serpent represents faith in Christ, who was lifted up on the cross for all who believe in Him, providing them eternal life and salvation from the sting of sin and death.