In a sailboat I become oblivious to everything else in the world.

Human beings, in their thinking, feeling and acting are not free agents but are as causally bound as the stars in their motion.

Desire for approval and recognition is a healthy motive, but the desire to be acknowledged as better, stronger, or more intelligent than a fellow being or fellow scholar easily leads to an excessively egoistic psychological adjustment, which may become injurious for the individual and for the community.

I learned many years ago never to waste time trying to convince my colleagues.

If the workers of this world, men and women, decide not to manufacture and transport ammunition, it would end war for all time. We must do that. Dedicate our lives to drying up the source of war; ammunition factories.

Pure logical thinking cannot yield us any knowledge of the empirical world. All knowledge of reality starts from experience and ends in it.

It is impossible to solve significant problems using the same knowledge that created them.