Institutio Oratoria

So also according to general opinion Phryne was saved not by the eloquence of Hyperides, admirable as it was, but by the sight of her exquisite body, which she further revealed by drawing aside her tunic. And if all these have power to persuade, the end of oratory, which we are discussing, cannot adequately be defined as persuasion.

Consequently those who, although holding the same general view of rhetoric, have regarded it as the power of persuasion by speaking, pride themselves on their greater exactness of language. This definition is given by Gorgias, in the dialogue [*](Gorg. p. 452 E. ) mentioned above, under compulsion from the inexorable logic of Socrates. Theodectes agrees with him, whether the treatise on rhetoric which has come down to us under his name is really by him or, as is generally believed, by Aristotle. In that work the end of rhetoric is defined as the leading of men by the power of speech to the conclusion desired by the orator.

But even this definition is not sufficiently comprehensive, since others besides orators persuade by speaking or lead others to the conclusion desired, as for example harlots, flatterers and seducers. On the other hand the orator is not always engaged on persuasion, so that sometimes persuasion is not his special object, while sometimes it is shared by others who are far removed from being orators.

And yet Apollodorus is not very far off this definition when he asserts that the first and all-important task of forensic oratory is to persuade the judge and lead his mind to the conclusions desired by the speaker. For

Some on the other hand pay no attention to results, as for example Aristotle, [*](Rhet. i. 2. ) who says

rhetoric is the power of discovering all means of persuading by speech.

Hermagoras, who asserts that its end is to speak persuasively, and others who express the same opinion, though in different words, and inform us that the end is to say everything which ought to be said with a view to persuasion, have been sufficiently answered above, when I proved that persuasion was not the privilege of the orator alone.

Various additions have been made to these definitions. For some hold that rhetoric is concerned with everything, while some restrict its activity to politics. The question as to which of these views is the nearer to the truth shall be discussed later in its appropriate place.

Aristotle seems to have implied that the sphere of the orator was all-inclusive when he defined rhetoric as the power to detect every element in any given subject which might conduce to persuasion; so too does Patrocles who omits the words in any given subject, but since he excludes nothing, shows that his view is identical. For he defines rhetoric as the power to discover whatever is persuasive in speech. These definitions like that quoted above include no more than the power of invention alone. Theodorus avoids this fault and holds that it is the power to discover and to utter forth in elegant language whatever is credible in every subject of oratory.

But, while others besides

. Plato makes Gorgias [*](Gorg. 454 B. ) say that he is a master of persuasion in the law-courts and other assemblies, and that his themes are justice and injustice, while in reply Socrates allows him the power of persuading, but not of teaching.