If someone feels that he has never made a mistake in his life, it only means that he has never tried anything new in his life.

Every reminiscence is colored by the way things are today, and therefore by a delusive point of view.

Mankind must give up war in the Atomic Era. What is at stake is the life or death of humanity.

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.

The secret to creativity is knowing how to hide your sources.

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.

I simply imagine it so, then go about to prove it.