 Because we think that we have to build a spiritual life or build a moral life, that we have to do something for God, that somehow we're sitting in a corner, facing the corner, trying to get something beautiful together so that we can turn around and go, Ta-da! God, are you proud of me? What do you think of what I've done? God's not interested in that at all, partly because if He wanted to do something amazing, He'd do it Himself.