Science has made unrestricted national sovereignty incompatible with human survival. The only possibilities are now world government or death.

It is not my prayer and humility that you cause things to go as you wish, but by acquiring a knowledge of natural laws.

The most savage controversies are about matters as to which there is no good evidence either way.

I often long to . . . give up my life to love of my neighbour. This is really a temptation.

The secret of happiness is this: let your interests be as wide as possible, and let your reactions to the things and persons that interest you be as far as possible friendly rather than hostile.

In a logically perfect language, there will be one word and no more for every simple object, and everything that is not simple will be expressed by a combination of words, by a combination derived, of course, from the words for the simple things that enter in, one word for each simple component.

Government can easily exist without laws, but law cannot exist without government.