"The only thing I know is that I know nothing."

"Patience is the companion of wisdom."

"It is the mark of an educated mind to be able to entertain a thought without acc..."

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

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

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

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

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