There is a difference between a real moral advance and a mere innovation. From the Confucian ‘Do not do to others what you would not like them to do to you’ to the Christian ‘Do as you would be done by’ is a real advance. The morality of Nietzsche is a mere innovation. The first is an advance because no one who did not admit the validity of the old maxim could see reason for accepting the new one, and anyone who accepted the old would at once recognize the new as an extension of the same principle. If he rejected it, he would have to reject it as a superfluity, something that went too far, not as something simply heterogeneous from his own ideas of value. But the Nietzschean ethic can be accepted only if we are ready to scrap traditional morals as a mere error and then to put ourselves in a position where we can find no ground for any value judgements at all. It is the difference between a man who says to us: ‘You like your vegetables moderately fresh; why not grow your own and have them perfectly fresh?’ and a man who says, ‘Throw away that loaf and try eating bricks and centipedes instead.’
C.S. Lewis – The abolition of Man