Protagoras | Page 5

Socrates proceeds to undermine the last stronghold of the adversary, first obtaining from him the admission that all virtue is in the highest degree good:--
The courageous are the confident; and the confident are those who know their business or profession: those who have no such knowledge and are still confident are madmen. This is admitted. Then, says Socrates, courage is knowledge--an inference which Protagoras evades by drawing a futile distinction between the courageous and the confident in a fluent speech.
Socrates renews the attack from another side: he would like to know whether pleasure is not the only good, and pain the only evil? Protagoras seems to doubt the morality or propriety of assenting to this; he would rather say that 'some pleasures are good, some pains are evil,' which is also the opinion of the generality of mankind. What does he think of knowledge? Does he agree with the common opinion that knowledge is overcome by passion? or does he hold that knowledge is power? Protagoras agrees that knowledge is certainly a governing power.
This, however, is not the doctrine of men in general, who maintain that many who know what is best, act contrary to their knowledge under the influence of pleasure. But this opposition of good and evil is really the opposition of a greater or lesser amount of pleasure. Pleasures are evils because they end in pain, and pains are goods because they end in pleasures. Thus pleasure is seen to be the only good; and the only evil is the preference of the lesser pleasure to the greater. But then comes in the illusion of distance. Some art of mensuration is required in order to show us pleasures and pains in their true proportion. This art of mensuration is a kind of knowledge, and knowledge is thus proved once more to be the governing principle of human life, and ignorance the origin of all evil: for no one prefers the less pleasure to the greater, or the greater pain to the less, except from ignorance. The argument is drawn out in an imaginary 'dialogue within a dialogue,' conducted by Socrates and Protagoras on the one part, and the rest of the world on the other. Hippias and Prodicus, as well as Protagoras, admit the soundness of the conclusion.
Socrates then applies this new conclusion to the case of courage--the only virtue which still holds out against the assaults of the Socratic dialectic. No one chooses the evil or refuses the good except through ignorance. This explains why cowards refuse to go to war:--because they form a wrong estimate of good, and honour, and pleasure. And why are the courageous willing to go to war?--because they form a right estimate of pleasures and pains, of things terrible and not terrible. Courage then is knowledge, and cowardice is ignorance. And the five virtues, which were originally maintained to have five different natures, after having been easily reduced to two only, at last coalesce in one. The assent of Protagoras to this last position is extracted with great difficulty.
Socrates concludes by professing his disinterested love of the truth, and remarks on the singular manner in which he and his adversary had changed sides. Protagoras began by asserting, and Socrates by denying, the teachableness of virtue, and now the latter ends by affirming that virtue is knowledge, which is the most teachable of all things, while Protagoras has been striving to show that virtue is not knowledge, and this is almost equivalent to saying that virtue cannot be taught. He is not satisfied with the result, and would like to renew the enquiry with the help of Protagoras in a different order, asking (1) What virtue is, and (2) Whether virtue can be taught. Protagoras declines this offer, but commends Socrates' earnestness and his style of discussion.
The Protagoras is often supposed to be full of difficulties. These are partly imaginary and partly real. The imaginary ones are (1) Chronological,--which were pointed out in ancient times by Athenaeus, and are noticed by Schleiermacher and others, and relate to the impossibility of all the persons in the Dialogue meeting at any one time, whether in the year 425 B.C., or in any other. But Plato, like all writers of fiction, aims only at the probable, and shows in many Dialogues (e.g. the Symposium and Republic, and already in the Laches) an extreme disregard of the historical accuracy which is sometimes demanded of him. (2) The exact place of the Protagoras among the Dialogues, and the date of composition, have also been much disputed. But there are no criteria which afford any real grounds for determining the date of composition; and the affinities of the Dialogues, when they are not indicated by Plato himself, must always to a great extent remain uncertain. (3) There is