Their usual mistaken premise is that they affirm some consensus among people, at least among tame peoples, concerning certain moral principles, and then conclude that these principles must be unconditionally binding also for you and me-or conversely, they see that among different peoples moral valuations are necessarily different and infer from this that no morality is binding-both of which are equally childish.

Nietzsche: The Gay Science: With a Prelude in German Rhymes and an Appendix of Songs (ed. Cambridge University Press, 2001) - ISBN: 9780521636452