Letter 29 — On the Critical Condition of Marcellinus (§1)

“You have been inquiring about our friend Marcellinus and you desire to know how he is getting along. He seldom comes to see me, for no other reason than that he is afraid to hear the truth, and at present he is removed from any danger of hearing it; for one must not talk to a man unless he is willing to listen. That is why it is often doubted whether Diogenes and the other Cynics, who employed an undiscriminating freedom of speech and offered advice to any who came in their way, ought to have pursued such a plan.”