Diogenous Laertiou Peri biōn, dogmatōn kai apophthegmatōn tōn en philosophia eudokimēsantōn biblia 10

But while I dwell for so long on those two philosophers, I might seem to do an injury to others, because I do not leave myself enough space to discuss them. But we must divide our efforts for this selection. Therefore, I myself, contributing to this consultation whatever I can by my own strength (that is, by the measure of my own judgment), say that those philosophers seem to me to be the most suited to the courts of princes who are neither entirely courtly (that is, of a purely courtly character, such as Aristippus was) nor have nothing courtly about them. And I think those were such who did not shrink from political affairs or from embassies. But I will proceed no further, lest I teach Minerva i.e., teach one's grandmother to suck eggs; attempting to teach the wise. For who could better choose a man suitable for the courts of princes than one who was an ornament to many both for his prudence and for his learning, and can provide precepts on how to properly instruct everyone? Farewell.