A Pair of Scissors

C.S. Lewis

"Handing everything over to Christ does not, of course, mean that you stop trying. To trust Him means, of course, trying to do all that He says. There would be no sense in saying you trusted a person if you would not take his advice. Thus if you have really handed yourself over to Him, it must follow that you are trying to obey Him. But trying in a new way, a less worried way. 

Not doing these things in order to be saved, but because He has begun to save you already. Not hoping to get to Heaven as a reward for your actions, but inevitably wanting to act in a certain way because a first faint gleam of Heaven is already inside you.

Christians have often disputed as to whether what leads the Christian home is good actions, or Faith in Christ. I have no right really to speak on such a difficult question, but it does seem to me like asking which blade in a pair of scissors is most necessary. A serious moral effort is the only thing that will bring you to the point where you throw up the sponge. Faith in Christ is the only thing to save you from despair at that point: and out of that Faith in Him good actions must inevitably come."

- C.S. Lewis, Mere Christianity

(see also the analogy of the woodpile)