Protagoras — Greek Philosopher

Protagoras was a pre-Socratic Greek philosopher and is numbered as one of the sophists by Plato. In his dialogue, Protagoras, Plato credits him with having invented the role of the professional sophist... (wikipedia)

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 do them unwillingly.
As to gods, I have no way of knowing either that they exist or do not exist, or what they are like.
There are two sides to every question.
Man is the measure of all things.
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.