One strength of the communist system of the East is that it has some of the character of a religion and inspires the emotions of a religion.

Stand still. The trees ahead and bush beside you are not lost.

Infinite striving to be the best is man's duty; It is its own reward. Everything else is in god's hands. It's not that I'm so smart, it's just that I stay with problems longer.

When I study philosophical works I feel I am swallowing something which I don't have in my mouth.

The ideals which have always shone before me and filled me with the joy of living are goodness, beauty, and truth. To make a goal of comfort or happiness has never appealed to me; a system of ethics built on this basis would be sufficient only for a herd of cattle.

Body and soul are not two different things, but only two different ways of perceiving the same thing. Similarly, physics and psychology are only different attempts to link our experiences together by way of systematic thought.

I don't teach my students, I provide the circumstances in which they can learn.