We have, in fact, two kinds of morality side by side; one which we preach but do not practise, and another which we practise but seldom preach. - Bertrand Russell

In America everybody is of the opinion that he has no social superiors, since all men are equal, but he does not admit that he has no social inferiors, for, from the time of Jefferson onward, the doctrine that all men are equal applies only upwards, not downwards.

I have no doubt that the present Prime Minister, for instance, is a most sincere Christian, but I should not advise any of you to go and smite him on one cheek. I think you might find that he thought this text was intended in a figurative sense.

It seems to me a fundamental dishonesty, and a fundamental treachery to intellectual integrity to hold a belief because you think it's useful and not because you think it's true.