A man should live with his superiors as he does with his fire; not too near, lest he burn; not too far off, lest he freeze."

"Protagoras asserted that there are two sides to every question, exactly opposite to each other."

Man is the most intelligent of the animals -- and the most silly.

"Those who have virtue always in their mouths, and neglect it in practice, are like a harp, which emits a sound pleasing to others, while itself is insensible of the music."

"As a matter of self-preservation, a man needs good friends or ardent enemies, for the former instruct him and the latter take him to task."