As men begin to grow civilized, they cease to be satisfied with mere taboos.

It was the duty of wives to submit to husbands, not of husbands to submit to wives. . . men have stronger muscles than women.

Awareness of universals is called conceiving, and a universal of which we are aware is called a concept.

An atheist, like a Christian, holds that we can know whether or not there is a God. The Christian holds that we can know there is a God; the atheist, that we can know there is not. The Agnostic suspends judgment, saying that there are not sufficient grounds either for affirmation or for denial. At the same time, an Agnostic may hold that the existence of God, though not impossible, is very improbable; he may even hold it so improbable that it is not worth considering in practice. In that case, he is not far removed from atheism.

I can only say that, while my own opinions as to ethics do not satisfy me, other people's satisfy me still less.

Not to be absolutely certain is, I think, one of the essential things in rationality.

It is not my prayer and humility that you cause things to go as you wish, but by acquiring a knowledge of natural laws.