"It is not in the still calm of the laboratory that men and women come to know truth. It is in the noise and tumult of the world that we learn what is true."

"Friendship with oneself is all-important, because without it one cannot be friends with anyone else in the world."

"I think that the greatest contribution that I could make would be to help people to think for themselves."

"Do what you feel in your heart to be right – for you'll be criticized anyway. You'll be damned if you do, and damned if you don't."

"If we fail to meet our problems here, no one else in the world will do so. If we fail, the heart goes out of progressives throughout the world."