Any fool can know. The point is to understand.

Enjoying the joys of others and suffering with them – these are the best guides for men.

It is a wonderful feeling to recognize the unifying features of a complex of phenomena which present themselves as quite unconnected to the direct experience of the senses.

A society's competitive advantage will come not from how well its schools teach the multiplication and periodic tables, but from how well they stimulate imagination and creativity.

It is the duty of every citizen according to his best capacities to give validity to his convictions in political affairs.

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

Learn from yesterday, live for today, hope for tomorrow.

I am predominantly critical concerning the activities, and especially the political activities, through history of the official clergy.

It should be possible to explain the laws of physics to a barmaid.

A man's ethical behaviour should be based effectually on sympathy, education, and social ties and needs; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death.