If I were not a Jew I would be a Quaker.

The most important method of education always has consisted of that in which the pupil was urged to actual performance.

We should take care not to make the intellect our god; it has, of course, powerful muscles, but no personality.

I see only with deep regret that God punishes so many of His children for their numerous stupidities, for which only He Himself can be held responsible; in my opinion, only His nonexistence could excuse Him.

The only sure way to avoid making mistakes is to have no new ideas.

Life is like riding a bicycle. To keep your balance, you must keep moving.

I agree with Schopenhauer that one of the most powerful motives that attracts people to science and art is the longing to escape from everyday life.