contributes to virtue from any source. And this is the case still more with those who mix discourses with actions, who not only, to use the language of Thucydides,21 "exercise themselves in the presence of danger," but also in regard to pleasures and strifes, and judgements, and advocateships, and magistrateships make a display of their opinions, or rather form their opinions by their practice. For we can no more think those philosophers who are ever learning and busy and investigating what they have got from philosophy, and then straightway publish it in the market-place or in the haunt of young men, or at a royal supper-party, any more than we give the name of physicians to those who sell drugs and mixtures. Nay rather such a sophist differs very little at all from the bird described in Homer,22 offering his scholars like it whatever he has got, and as it feeds its callow young from its own mouth, "though it goes ill with itself," so he gets no advantage or food from what he has got for himself.
§ ix. We must therefore see to it that our discourse be serviceable to ourselves, and that it may not appear to others to be vain-glorious or ambitious, and we must show that we are as willing to listen as to teach, and especially must we lay aside all disputatiousness and love of strife in controversy, and cease bandying fierce words with one another as if we were contending with one another at boxing, and leave off rejoicing more in smiting and knocking down one another than in learning and teaching. For in such cases moderation and mildness, and to commence arguing without quarrelsomeness and to finish without getting into a rage, and neither to be insolent if you come off best in the argument, nor dejected if you come off worst, is a sufficient sign of progress in virtue. Aristippus was an excellent example of this, when overcome in argument by the sophistry of a man, who had plenty of assurance, but was generally speaking mad or half-witted. Observing that he was in great joy