Theory of Sokrates — that all art of persuasion must be founded upon a knowledge of the truth, and of gradations of resemblance to the truth.
He may persuade the people under these circumstances (replies Sokrates), but if he does so, it will be to their misfortune and to his own. He ought to know the real truth — not merely what the public whom he addresses believe to be the truth — respecting just and unjust, good and evil, &c. There can be no genuine art of speaking, which is not founded upon knowledge of the truth, and upon adequate philosophical comprehension of the subject-matter.[63] The rhetorical teachers take too narrow a view of rhetoric, when they confine it to public harangues addressed to the assembly or to the Dikastery. Rhetoric embraces all guidance of the mind through words, whether in public harangue or private conversation, on matters important or trivial. Whether it be a controversy between two litigants in a Dikastery, causing the Dikasts to regard the same matters now as being just and good, presently as being unjust and evil: or between two dialecticians like Zeno, who could make his hearers view the same subjects as being both like and unlike — both one and many — both in motion and at rest: in either case the art (if there be any art) and its principles are the same. You ought to assimilate every thing to every thing, in all cases where assimilation is possible: if your adversary assimilates in like manner, concealing the process from his hearers, you must convict and expose his proceedings. Now the possibility or facility of deception in this way will depend upon the extent of likeness between things. If there be much real likeness, deception is easy, and one of them may easily be passed off as the other: if there be little likeness, deception will be difficult. An extensive acquaintance with the real resemblances of things, or in other words with truth, constitutes the necessary basis on which all oratorical art must proceed.[64]
[63] Plato, Phædrus, pp. 260-261.
[64] Plato, Phædrus, p. 262.
Comparison made by Sokrates between the discourse of Lysias and his own. Eros is differently understood: Sokrates defined what he meant by it: Lysias did not define.
Sokrates then compares the oration of Lysias with his own two orations (the first depreciating, the second extolling, Eros) in the point of view of art; to see how far they are artistically constructed. Among the matters of discourse, there are some on which all men are agreed, and on which therefore the speaker may assume established unanimity in his audience: there are others on which great dissension and discord prevail. Among the latter (the topics of dissension), questions about just and unjust, good and evil, stand foremost:[65] it is upon these that deception is most easy, and rhetorical skill most efficacious. Accordingly, an orator should begin by understanding to which of these two categories the topic which he handles belongs: If it belongs to the second category (those liable to dissension) he ought, at the outset, to define what he himself means by it, and what he intends the audience to understand. Now Eros is a topic on which great dissension prevails. It ought therefore to have been defined at the commencement of the discourse. This Sokrates in his discourse has done: but Lysias has omitted to do it, and has assumed Eros to be obviously and unanimously apprehended by every one. Besides, the successive points in the discourse of Lysias do not hang together by any thread of necessary connection, as they ought to do, if the discourse were put together according to rule.[66]
[65] Plato, Phædrus, p. 263 B. Compare Plato, Alkibiad. i. p. 109.
[66] Plato, Phædrus, pp. 263-265.
Logical processes — Definition and Division — both of them exemplified in the two discourses of Sokrates.
Farthermore, in the two discourses of Sokrates, not merely was the process of logical definition exemplified in the case of Eros — but also the process of logical division, in the case of Madness or Irrationality. This last extensive genus was divided first into two species — Madness, from human distemper — Madness, from divine inspiration, carrying a man out of the customary orthodoxy.[67] Next, this last species was again divided into four branches or sub-species, according to the God from whom the inspiration proceeded, and according to the character of the inspiration — the prophetic, emanating from Apollo — the ritual or mystic, from Dionysus — the poetic, from the Muses — the amatory, from Eros and Aphroditê.[68] Now both these processes, definition and division, are familiar to the true dialectician or philosopher: but they are not less essential in rhetoric also, if the process is performed with genuine art. The speaker ought to embrace in his view many particular cases, to gather together what is common to all, and to combine them into one generic concept, which is to be embodied in words as the definition. He ought also to perform the counter-process: to divide the genus not into parts arbitrary and incoherent (like a bad cook cutting up an animal without regard to the joints) but into legitimate species;[69] each founded on some positive and assignable characteristic. “It is these divisions and combinations (says Sokrates) to which I am devotedly attached, in order that I may become competent for thought and discourse: and if there be any one else whom I consider capable of thus contemplating the One and the Many as they stand in nature — I follow in the footsteps of that man as in those of a God. I call such a man, rightly or wrongly, a Dialectician.”[70]