"Common sense is not so common."

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

"Patience is the companion of wisdom."

"Silence is a source of great strength."

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

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

"Knowing yourself is the beginning of all wisdom."

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