No one would easily take an instruction to look up to a bronze serpent on a pole and be healed of a bite from a snake. I takes faith to do something unconventional like that. You would expect some medicine to be applied on the wound or to drink to heal you. However, in the wilderness, Israel was expected to forget the snakes on the ground and fix their eyes on the bronze serpent on a pole. This was a type of Jesus. That when all was said and done, the Son of Man was lifted from the earth...