If you wish to educate a child who has gone wrong, then you must, above all, keep your attention fixed on the intersection of two charmed circles.

An educator's most important task, one might say his holy duty, is to see to it that no child is discouraged at school, and that a child who enters school already discouraged regains his self-confidence through his school and his teacher. This goes hand in hand with the vocation of the educator, for education is possible only with children who look hopefully and joyfully upon the future.

Follow your heart but take your brain with you.

War is not the continuation of politics with different means, it is the greatest mass-crime perpetrated on the community of man.

What person, confined in a small room with nothing but a tea-cosy, will not eventually put the tea-cosy on their head?

A lie would have no sense unless the truth were felt as dangerous.

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.