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

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

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

"The fool doth think he is wise, but the wise man knows himself to be a fool."

"In a gentle way, you can shake the world."

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

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

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