It is not so important where one settles down. The best thing is to follow your instincts without too much reflection.

I consider it important, indeed urgently necessary, for intellectual workers to get together, both to protect their own economic status and, also, generally speaking, to secure their influence in the political field.

The truth of a theory can never be proven, for one never knows if future experience will contradict its conclusions.

I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.

I wish to do something Great and Wonderful, but I must start by doing the little things like they were Great and Wonderful

When a man points a finger at someone else, he should remember that three of his fingers are pointing at himself. Do not worry about your difficulties in mathematics; I can assure you that mine are still greater.

I believe that whatever we do or live for has its causality; it is good, however, that we cannot see through to it.