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

Americans need rest, but do not know it.

Power is sweet; it is a drug, the desire for which increases with a habit.

If I were a medical man, I should prescribe a holiday to any patient who considered his work important.

Many orthodox people speak as though it were the business of sceptics to disprove received dogmas rather than of dogmatists to prove them. This is, of course, a mistake.

I do not think any reasonable person can doubt that in India, China and Japan, if the knowledge of birth control existed, the birthrate would fall very rapidly

For over two thousand years it has been the custom among earnest moralists to decry happiness as something degraded and unworthy