"Man is the measure of all things."

"No intelligent man believes that anybody ever willingly errs or willingly does base and evil deeds; they are well aware that all who do base and evil things to them unwillingly."

"There are two sides to every question."

"Let us hold our discussion together in our own persons, making trial of the truth and of ourselves."

"The Athenians are right to accept advice from anyone, since it is incumbent on everyone to share in that sort of excellence, or else there can be no city at all."

"As to gods, I have no way of knowing either that they exist or do not exist, or what they are like."