To become as fine silver or as purest gold, first we must be refined. Not in the way the world would see refinement, but through test of our character and faith. To be a useful vessel for the spirit, we must be made empty. Heated over and over in trials that test us. Becoming something pure in our faithfulness. Always holding fast to that which we cannot see. When we have been cleansed, then we are worthy to be called to the service of God.