One should respect an honest person even if he expresses opinions differing from one's own.

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.

Science without religion is lame, religion without science is blind.

The only real valuable thing is intuition. The intellect has little to do on the road to discovery

What really interests me is whether God had any choice in the creation of the World.

Never let yourself be seduced by any problem, no matter how difficult.

Our lives will be measured by what we do for others