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

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

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

"Patience is the companion of wisdom."

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

"He who has a why to live can bear almost any how."

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

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