Plato, Gorgias — Greek text with English translation

So it is not the teachers who are wicked, nor is the art either guilty or wicked on this account, but rather, to my thinking, those who do not use it properly. Now the same argument applies also to rhetoric: for the orator is able, indeed, to speak against every one and on every question in such a way as to win over the votes of the multitude, practically in any matter he may choose to take up: but he is no whit the more entitled to deprive the doctors of their credit, just because he could do so, or other professionals of theirs; he must use his rhetoric fairly, as in the case of athletic exercise. And, in my opinion, if a man becomes a rhetorician and then uses this power and this art unfairly, we ought not to hate his teacher and cast him out of our cities. For he imparted that skill to be used in all fairness, whilst this man puts it to an opposite use. Thus it is the man who does not use it aright who deserves to be hated and expelled and put to death, and not his teacher.

I therefore, if you are a person of the same sort as myself, should be glad to continue questioning you: if not, I can let it drop. Of what sort am I? One of those who would be glad to be refuted if I say anything untrue, and glad to refute anyone else who might speak untruly; but just as glad, mind you, to be refuted as to refute, since I regard the former as the greater benefit, in proportion as it is a greater benefit for oneself to be delivered from the greatest evil than to deliver some one else. For I consider that a man cannot suffer any evil so great as a false opinion on the subjects of our actual argument. Now if you say that you too are of that sort, let us go on with the conversation; but if you think we had better drop it, let us have done with it at once and make an end of the discussion.