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

Time is relative; its only worth depends upon what we do as it is passing.

I wouldn't want to live if I did not have my work. In any case, it's good that I'm already old and personally don't have to count on a prolonged future.

Matter is spirit reduced to point of visibility.

The pursuit of knowledge is more valuable than its possession.

It's no accident that capitalism has brought with it progress, not merely in production but also in knowledge. Egoism and competition are, alas, stronger forces than public spirit and sense of duty.

Concepts that have proven useful in ordering things easily achieve such authority over us that we forget their earthly origins and accept them as unalterable givens.