[480a]
Socrates
Very well: so if this is true, Polus, what is the great use of rhetoric? For you see by what we have just agreed that a man must keep a close watch over himself so as to avoid wrongdoing, since it would bring a great deal of evil upon him; must he not?
Polus
Certainly.
Socrates
But if he is guilty of wrongdoing, either himself or anyone else he may care for, he must go of his own freewill where he may soonest pay the penalty, to the judge