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

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

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

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

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

"Common sense is not so common."

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

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