[6]
For it is permissible to those who give any other instruction to be exacting in matters open to dispute, since nothing prevents those who have been made adept in other lines of training from being dishonorable in the matter of contracts. But men who inculcate virtue and sobriety—is it not absurd if they do not trust in their own students before all others?1 For it is not to be supposed that men who are honorable and just-dealing with others will be dishonest with the very preceptors who have made them what they are.
1 Cf. the same ridicule in Plat. Gorg. 519c, Plat. Gorg. 460e.