"Knowing yourself is the beginning of all wisdom."

"Patience is the companion of wisdom."

"A wise man can learn more from a foolish question than a fool can learn from a w..."

"To know what you know and what you do not know, that is true knowledge."

"The measure of intelligence is the ability to change."

"It is not that I'm so smart. But I stay with the questions much longer."

"The mind is everything. What you think you become."

"The only thing we have to fear is fear itself."