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

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

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

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

"Knowing yourself is the beginning of all wisdom."

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

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

"It is not that I'm so smart. But I stay with the questions much longer."