"Working together works."

"Every great mistake has a halfway moment, a split second when it can be recalled and perhaps remedied."

"Optimism is a kind of heart stimulus--the digitalis of failure."

"Optimism is a kind of heart stimulus--the digitalis of failure."

"Knowledge is of two kinds: we know a subject ourselves, or we know where we can find information on it."

"You don't have to be a fantastic hero to do certain things - to compete. You can be just an ordinary chap, sufficiently motivated to reach challenging goals."

"Do not wait; the time will never be 'just right.' Start where you stand, and work with whatever tools you may have at your command, and better tools will be found as you go along."

"Life is full of chances and changes, and the most prosperous of men may...meet with great misfortunes."

"The greatest discovery of my generation is that human beings can alter their lives by altering their attitudes of mind."

"The optimist proclaims that we live in the best of all possible worlds; and the pessimist fears this is true."