"All human progress, even in morals, has been the work of men who have doubted the current moral values, not of men who have whooped them up and tried to enforce them."
- H.L. Mencken

"The struggle against a purpose in art is always a struggle against the moral tendency in art - against its subordination to morality. Art for art's sake means, Let morality go to the Devil."
- Friedrich Nietzsche

"Each of you, for himself, by himself and on his own responsibility, must speak. And it is a solemn and weighty responsibility, and not lightly to be flung aside at the bullying of pulpit, press, government, or the empty catchphrases of politicians. Each must for himself alone decide what is right and what is wrong, and which course is patriotic and which isn't. You cannot shirk this and be a man. To decide against your convictions is to be an unqualified and inexcusable traitor, both to yourself and to your country, let man label you as they may. If you alone of all the nation shall decide one way, and that way be the right way according to your convictions of the right, you have done your duty by yourself and by your country- hold up your head! You have nothing to be ashamed of."
- Mark Twain

"So far, about morals, I know only that what is moral is what you feel good after and what is immoral is what you feel bad after."
-Ernest Hemingway