"We don't see things as they are, we see them as we are."

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

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

"Silence is a source of great strength."

"A wise man can learn more from a foolish question than a fool can learn from a w..."

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

"Judge a man by his questions rather than his answers."

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