Plato’s distrust of rhetoric is a permanent reminder. It is so significantly typical that it recurs throughout the history of education, and must recur. Again and again educational practise has found that it cannot do without rhetoric; again and again educational theory has grudgingly inquired what to do with it. For distrust of rhetoric may be more than the impatience of the philosopher with the orator, of speculation with ordered presentation, of the quest for truth with persuasion. This is involved too; for philosophers have often been impatient of presentation. They have wished to think aloud, or to question and answer, or merely to analyze for themselves, without being held to consecutive explanation. Plato himself falls short of discerning the importance of making truth available and effective for the mass of men incapable of scientific analysis; and this is the ground of Cicero’s rejoinder.[1] But Plato’s distrust is more deeply of rhetoric as he heard it taught. Even in his day Greek rhetoric was largely sophistic, the rhetoric of personal display and triumph. In the _Gorgias_[2] Socrates admits the function of a nobler rhetoric, but cannot find it in use. In the _Protagoras_[3] he asks the vital question, “_About what_ does the sophist make a man more eloquent?” In the _Phædrus_, which discusses rhetoric more specifically, his satire is most evidently of sophistic. To this the ultimate objection is moral. A man should train himself “not with a view to speaking and acting before the world, but for the sake of making himself able ... to please the gods.”[4] Plato challenges not merely the method of the sophists, but their ideal. Since rhetoric has almost always had some part in education, and since it always ultimately involves morality, Plato raises a leading question. The ultimate, the only final answer to Plato’s challenge is the _Rhetoric_ of Aristotle. This proceeds from a conception not only larger than the sophistic of Gorgias and Protagoras, but also significantly divergent in aim. The true theory of rhetoric as the energizing of knowledge, the bringing of truth to bear upon men,[5] is there established for all time. Aristotle amply vindicated rhetoric by defining its place among studies, its necessary correlation with inquiry and with policy, its permanent function. He settled the question of rhetoric philosophically. He established its theory. But this theory was oftener accepted than followed. The sophists had, indeed, been put in their place more surely by Aristotle than by Plato; but they continued to thrive, until ancient rhetoric became more and more sophistic.