"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."

"Happiness is not a goal; it is a by-product."

"The purpose of life is to live it, to taste experience to the utmost, to reach out eagerly and without fear for newer and richer experience."

"I have never felt that anything really belonged to me unless I paid for it."

"Freedom makes a huge requirement of every human being. With freedom comes responsibility."