Psalms 66:10

"For thou, O God, hast proved us: thou hast tried us, as silver is tried." (There is not an ingot of silver in heaven's treasury that has not been in the furnace on earth and been purified seven times. There is not a gem of purest, serene ray that the divine jeweler has not exposed to every sort of test. There is not an atom of gold in the Redeemer's crown that has not been molten among the hottest coals to rid it of its alloy. It is universal to every child of God: if we are servants of the Lord, we must be tested. We will never enter heaven unproved. We must be tested in the fire; the test must take place for every one of us. Nor do I think we ought to shun it. All our passages through the fiery furnace make us like swords when they are well tempered; they are ready to cut right through the bone. We will not cease from being tested until we get to heaven. Then it will be all over, and we will sing, and this will be the sweet note of it: "You have tested us, our God, and blessed be your name for it! Before we were afflicted, we went astray, but now have we kept your Word.")

Charles H. Spurgeon