“'Can’t you lead a good life without believing in Christianity?’ This is the question on which I have been asked to write, and straight away, before I begin trying to answer it, I have a comment to make. The question sounds as if it were asked by a person who said to himself, ‘I don’t care whether Christianity is in fact true or not. I’m not interested in finding out whether the real universe is more like what the Christians say than what the materialists say. All I’m interested in is leading a good life. I’m going to choose beliefs not because I think them true but because I think them helpful.’ Now frankly, I find it hard to sympathize with this state of mind…. Christianity is not a patent medicine.”
C.S. Lewis “Man or Rabbit?” in The Grand Miracle