In consistency with the doctrine that Knowledge is virtue, it is maintained here as elsewhere, that a man knowing good and evil must act upon that knowledge.

Plato often repeats his theory of Measurement, but never again specifically intimates that the things to be measured are pleasures and pains.

And neither here nor elsewhere, does he suppose the virtuous man taking directly into his calculation the pleasures and pains of other persons.
GORGIAS, one of the most renowned of the dialogues in point of composition, is also ethical, but at variance with the Protagoras, and more in accordance with Plato's predominating views.

The professed subject is Rhetoric, which, as an art, Sokrates professes to hold in contempt.

The dialogue begins with the position that men are prompted by the desire of good, but proceeds to the great Platonic paradox, that it is a greater evil to do wrong than to suffer wrong.