Silver

A lady once asked a blacksmith "How do you get all the impurities out of silver?" The blacksmith answered "Well we melt it in the fire." The Lady then asked him, "Well how do you know when its done?" The blacksmith answered the lady " Well you have to watch the silver very, very carefully and intentlly. But the craftsmen can tell that its completely impure when he can see himself in it."
We are the silver and God is the Craftsman. Let him stick you in the fire a couple of times until he can fully see himself in you.