"Silence is a source of great strength."

"Science is organized knowledge. Wisdom is organized life."

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

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

"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."

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

"Knowing yourself is the beginning of all wisdom."