Religion deserves no more respect than a pile of garbage.

I believe in only one thing and that thing is human liberty. If ever a man is to achieve anything like dignity, it can happen only if superior men are given absolute freedom to think what they want to think and say what they want to say. I am against any man and any organization which seeks to limit or deny that freedom... [and] the superior man can be sure of freedom only if it is given to all men.

Life without sex might be safer but it would be unbearably dull

What restrains us from killing is partly fear of punishment, partly moral scruple, and partly what may be described as a sense of humor

Faith may be defined briefly as an illogical belief in the occurrence of the improbable.... A man full of faith is simply one who has lost (or never had) the capacity for clear and realistic thought. He is not a mere ass: he is actually ill.

In any combat between a rogue and a fool the sympathy of mankind is always with the rogue.

I know a good many men of great learning-that is, men born with an extraordinary eagerness and capacity to acquire knowledge. One and all, they tell me that they can't recall learning anything of any value in school. All that schoolmasters managed to accomplish with them was to test and determine the amount of knowledge that they had already acquired independently-and not infrequently the determination was made clumsily and inaccurately.