"Silence is a source of great strength."

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

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

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

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

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

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

"By three methods we may learn wisdom: first, by reflection, which is noblest; se..."