When you prevent me from doing anything I want to do, that is persecution; when I prevent you from doing anything you want to do, that is law, order, and morals.

There is not one single established religion that an intelligent, educated man can believe.

There is no accomplishment so easy to acquire as politeness and none more profitable.

I ... must continue to strive for more knowledge and more power, though the new knowledge always contradicts the old and the new power is the destruction of the fools who misuse it.

What God hath joined together no man shall put asunder: God will take care of that.

The faults of the burglar are the qualities of the financier.

We are more gullible and superstitious today than we were in the Middle Ages, and an example of modern credulity is the widespread belief that the Earth is round. The average man can advance not a single reason for thinking that the Earth is round. He merely swallows this theory because there is something about it that appeals to the twentieth century mentality.