About Protagoras:
Protagoras 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.
Let us hold our discussion together in our own persons, making trial of the truth and of ourselves.
ProtagorasAs to gods, I have no way of knowing either that they exist or do not exist, or what they are like.
Protagoras