The conception animating the practise and the teaching of sophistic, far from being limited to antiquity, is medieval as well, and modern. Apparently it is permanent. Rhetoric is conceived by Aristotle as the art of giving effectiveness to truth; it is conceived alike by the earlier and the later sophists and by their successors as the art of giving effectiveness to the speaker. The conceptions are not contradictory. The second may be theoretically included within the first; and actually Demosthenes may learn something from Isocrates. But to embody them in educational procedure, to carry out either as the controlling idea of a course of study, is to discover that sooner or later they become practically incompatible. Ingenuous youth will be devoted either to energizing truth or to exploiting itself. There will come a parting of the ways; for the two conceptions are divergent. What Aristotle discerned as differentiating is differentiating still. The flaw in sophistic is moral. It may not impair technical training; but by deviating motive it tends to impair education. For Aristotle’s theory is a touchstone. To recall rhetoric to the true function discerned by him has repeatedly been the object of reform in teaching. What has intervened to deviate rhetoric and frustrate its best use has again and again been the preoccupation with giving effectiveness not to the message, but to the speaker. Ancient sophistic is thus typical. It is not merely historical; it is historic. The false conception divined by Plato, and exposed finally by Aristotle’s demonstration of the true conception, led ancient rhetoric through empty personal triumphs into an elaborate art of display, devoid, at its worst, of other motive. As sophistic spread, as its idea of rhetoric became dominant, ancient education was narrowed;[6] and ancient oratory eddied in shallows until it found a new course with the new motive of Christian preaching. In exorcising the false conception Aristotle removed the false sophistic emphasis from style. He does not despise, nor even slight, technic. He finds analysis of sentence rhythms necessary. But his goal in this, as in his analysis of figures, is beyond the technical means of securing particular effects. He does not classify figures for reference; he seeks in both phrase and cadence the function; and he discusses neither until he has spent some two-thirds of his treatise on the function of rhetoric as a whole course of study. This he finds philosophically necessary. Otherwise rhetoric cannot be justified; otherwise, he clearly implies, it is narrowed and degraded. For him rhetoric is so inextricably moral that it should never be divorced from subject matter of real significance.