As long as there are sovereign nations possessing great power, war is inevitable.

What I value in life is quality rather then quantity.

We are in the position of a little child entering a huge library, whose walls are covered to the ceiling with books in many different languages. The child knows that someone must have written those books. It does not know who or how. It does not understand the the languages in which they are written. The child notes a definite plan in the arrangement of the books, a mysterious order, which it does not comprehend but only dimly suspects.

If you want different results, do not do the same things.

The only way to escape the personal corruption of praise is to go on working. One is tempted to stop and listen to it. The only thing is to turn away and go on working. Work. There is nothing else.

The importance of a problem should not be judged by the number of pages devoted to it.

My pacifism is not based on any intellectual theory but on a deep antipathy to every form of cruelty and hatred.