So Moses made a bronze serpent, and put it on a pole; and so it was, if a serpent had bitten anyone, when he looked at the bronze serpent, he lived. Numbers 21:9
The bronze serpent on the pole was there for those who had been bitten. When an Israelite was bitten, then the looking would save him.
Our salvation is all about looking to Jesus Christ who, like the bronze serpent, was lifted up so that those about to die might live. Might look, and live.