"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

"A tiger does not proclaim its tigritude, it pounces."

"The only way to make sense out of change is to plunge into it, move with it, and join the dance."

"The human mind is a wonderful thing. It starts working the moment you're born and never stops until you stand up to speak in public."

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