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

"Knowing yourself is the beginning of all wisdom."

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

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

"Patience is the companion of wisdom."

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

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

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