"Thinking is the hardest work there is, which is probably the reason why so few engage in it."

"When everything seems to be going against you, remember that the airplane takes off against the wind, not with it."

"An educated man is not one whose memory is trained to carry a few dates in history - he is one who can accomplish things."

"Whether you believe you can or you can't, you're probably right."

"Coming together is a beginning; keeping together is progress; working together is success."