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

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

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

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

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

"Common sense is not so common."

"The fool doth think he is wise, but the wise man knows himself to be a fool."

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