"A good scientist thinks logically and accurately when conditions call for logical and accurate thinking—but so does any other good worker when he has a sufficient number of well-founded facts to serve…"

"The best way to learn is to teach."

"The greatest discovery of all time is that a person can change his future by merely changing his attitude."

"I think that the most important thing is to be honest with yourself and with others."

"I believe that the human spirit is indomitable, and that we can overcome any challenge if we set our minds to it."