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

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

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

"The only true wisdom is in knowing you know nothing."

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

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

"Judge a man by his questions rather than his answers."

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