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

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

"It is the mark of an educated mind to be able to entertain a thought without acc..."

"Silence is a source of great strength."

"Patience is the companion of wisdom."

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

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

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