Marriage is for women the commonest mode of livelihood, and the total amount of undesired sex endured by women is probably greater in marriage than in prostitution.

Mathematics may be defined as the subject in which we never know what we are talking about, nor whether what we are saying is true.

The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.

There was, I think, never any reason to believe in any innate superiority of the male, except his superior muscle.

Ethics is in origin the art of recommending to others the sacrifices required for co-operation with oneself.

Without civic morality communities perish; without personal morality their survival has no value.

Men can be stimulated by hope or driven by fear, but the hope and the fear must be vivid and immediate if they are to be effective without producing weariness.

Mysticism is, in essence, little more than a certain intensity and depth of feeling in regard to what is believed about the universe.

We are all prone to the malady of the introvert, who, with the manifold spectacle of the world spread out before him, turns away and gazes only upon the emptiness within. But let us not imagine that there is anything grand about the introvert's unhappiness.

The sentiments of an adult are compounded of a kernal of instinct surrounded by a vast husk of education.