A man without a bias cannot write interesting history - if indeed such a man exists.

Nine-tenths of the appeal of pornography is due to the indecent feelings concerning sex which moralists inculcate in the young; the other tenth is physiological, and will occur in one way or another whatever the state of the law may be.

That Plato's Republic should have been admired, on its political side, by decent people, is perhaps the most astonishing example of literary snobbery in all history.

Human nature is so constructed that it gives affection most readily to those who seem least to demand it.

The resistance to a new idea increases by the square of its importance.

The wise man thinks about his troubles only when there is some purpose in doing so; at other times he thinks about other things, or, if it is night, about nothing at all.

One of the most powerful of all our passions is the desire to be admired and respected.