We must be prepared to pay a price for freedom, for no price that is ever asked for it is half the cost of doing without it.

He marries best who puts it off until it is too late.

In the long run all battles are lost, and so are all wars.

Hygiene is the corruption of medicine by morality. It is impossible to find a hygienist who does not debase his theory of the healthful with a theory of the virtuous. ... The aim of medicine is surely not to make men virtuous; it is to safeguard them from the consequences of their vices.

Progress: The process whereby the human race has got rid of whiskers, the vermiform appendix and God.

If the American people really tire of democracy and want to make a trial of Fascism, I shall be the last person to object. But if that is their mood, then they had better proceed toward their aim by changing the Constitution and not by forgetting it.

[Thomas Henry] Huxley, I believe, was the greatest Englishman of the Nineteenth Century—perhaps the greatest Englishman of all time. When one thinks of him, one thinks inevitably of such men as Goethe and Aristotle. For in him there was that rich, incomparable blend of intelligence and character, of colossal knowledge and high adventurousness, of instinctive honesty and indomitable courage which appears in mankind only once in a blue moon. There have been far greater scientists, even in England, but there has never been a scientist who was a greater man.