Moral certainty is always a sign of cultural inferiority. The more uncivilized the man, the surer he is that he knows precisely what is right and what is wrong.

The so-called new morality is too often the old immorality condoned.

I never came across anyone in whom the moral sense was dominant who was not heartless, cruel, vindictive, log-stupid, and entirely lacking in the smallest sense of humanity. Moral people, as they are termed, are simple beasts.

Moral indignation is jealousy with a halo.

As soon as one is unhappy one becomes moral.

Morality turns on whether the pleasure precedes the pain or follows it ... Thus, it is immoral to get drunk because the headache comes after the drinking, but if the headache came first, and the drunkenness afterwards, it would be moral to get drunk.

Morality is the theory that every human act must be either right or wrong, and that 99 per cent of them are wrong.

Morality is simply the attitude we adopt towards people whom we personally dislike.

There is a moral, of course, and like all morals it is better not pursued.

The essence of immorality is the tendency to make an exception of one's self.

The highest possible stage in moral culture is when we recognize that we ought to control our thoughts.