Science tells us what we can know, but what we can know is little, and if we forget how much we cannot know we become insensitive to many things of great importance.

Protagoras did not know if the gods exist, but he held in any case they ought to be worshiped. Philosophy, according to him, had nothing edifying to teach, and for the survival of morals we must rely upon the thoughtlessness of the majority and their willingness to believe what they had been taught.

In science the successors stand upon the shoulders of their predecessors; where one man of supreme genius has invented a method, a thousand lesser men can apply it. ... In art nothing worth doing can be done without genius; in science even a very moderate capacity can contribute to a supreme achievement.

I read Zuleika Dobson with pleasure. It represents the Oxford that the two World Wars have destroyed with a charm that is not likely to be reproduced anywhere in the world for the next thousand years.

Only in thought is man a God; in action and desire we are the slaves of circumstance.

The taboo against nakedness is an obstacle to a decent attitude on the subject of sex.

A good world needs knowledge, kindliness, and courage; it does not need a regretful hankering after the past or a fettering of the free intelligence by the words uttered long ago by ignorant men.