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.

It seems to me now that mathematics is capable of an artistic excellence as great as that of any music, perhaps greater; not because the pleasure it gives (although very pure) is comparable, either in intensity or in the number of people who feel it, to that of music, but because it gives in absolute perfection that combination, characteristic of great art, of godlike freedom, with the sense of inevitable destiny; because, in fact, it constructs an ideal world where everything is perfect and yet true.

Every increase in knowledge requires an increase in wisdom

Orthodoxy is the grave of intelligence, no matter what orthodoxy it may be.

Suppose atomic bombs had reduced the population of the world to one brother and sister; should they let the human race die out?

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

There was a law in Connecticut - I believe it is still formally unrepealed - making it illegal for a man to kiss his wife on Sunday.