Mathematics is pure language - the language of science. It is unique among languages in its ability to provide precise expression for every thought or concept that can be formulated in its terms.

The style of life is a unity because it has grown out of the difficulties of early life and out of the striving for a goal.

Play is a child's work and this is not a trivial pursuit.

Follow your heart but take your brain with you.

The only worthwhile achievements of man are those which are socially useful.

The truth is often a terrible weapon of aggression. It is possible to lie, and even to murder, with the truth.

In the company of friends, writers can discuss their books, economists the state of the economy, lawyers their latest cases, and businessmen their latest acquisitions, but mathematicians cannot discuss their mathematics at all. And the more profound their work, the less understandable it is.