Imagination without knowledge may create beautiful things, knowledge without imagination can create only perfect ones.

I believe that a simple and unassuming manner of life is best for everyone, best both for the body and the mind.

Never lose a holy curiosity.

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.

Don't let the measurable drive out the relevant

A happy man is too satisfied with the present to dwell too much on the future.

I received your letter of June 10th. I have never talked to a Jesuit priest in my life and I am astonished by the audacity to tell such lies about me. From the viewpoint of a Jesuit priest I am, of course, and have always been an atheist.