If you had the power to destroy the world, would you do so?

Our individual life is brief, and perhaps the whole life of mankind will be brief if measured in astronomical scale

Our great democracies still tend to think that a stupid man is more likely to be honest than a clever man.

When a man tells you that he knows the exact truth about anything you are safe in inferring that he is an inexact man.

Conquer the world by intelligence, and not merely by being slavishly subdued by the terror that comes from it.

I did not, however, commit suicide, because I wished to know more of mathematics.

Those whose lives are fruitful to themselves, to their friends, or to the world are inspired by hope and sustained by joy: they see in imagination the things that might be and the way in which they are to be brought into existence.