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

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

Is a man what he seems to the astronomer, a tiny lump of impure carbon and water crawling impotently on a small and unimportant planet? Or is he what he appears to Hamlet? Is he perhaps both as once?

We love our habits more than our income, often more than our life.

The commonest objection to birth control is that it is against nature.

Most people believe in God because they have been taught from early infancy to do it, and that is the main reason. Then I think that the next most powerful reason is the wish for safety.

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