I believe in intuition and inspiration...at times I feel certain I am right while not knowing the reason.

Earnestly I must exert myself in order to return as much as I have received.

Great spirits often meet violent oppisition with mediocre minds.

When I was still a rather precocious young man, I already realized most vividly the futility of the hopes and aspirations that most men pursue throughout their lives.

[O]nly if every individual strives for truth can humanity attain a happier future; the atavisms in each of us that stand in the way of a friendlier destiny can only thus be rendered ineffective.

If I had my life to live over again, I would elect to be a trader of goods rather than a student of science. I think barter is a noble thing.

Isn't it strange that I who have written only unpopular books should be such a popular fellow?