The most pathetic person in the world is someone who has sight, but has no vision.

No pessimist ever discovered the secret of the stars, or sailed to an uncharted land, or opened a new doorway for the human spirit.

The best educated human being is the one who understands most about the life in which he is placed.

Commercial concerns have expanded from family business to corporate wealth which is self-perpetuating and which enlightened statesmen and economists now dread as the most potent oligarchy yet produced.

The test of a democracy is not the magnificence of buildings or the speed of automobiles or the efficiency of air transportation, but rather the care given to the welfare of all the people.

Now I feel as if I should succeed in doing something in mathematics, although I cannot see why it is so very important. . . The knowledge doesn't make life any sweeter or happier, does it?

The bulk of the world's knowledge is an imaginary construction.