Letter 109 — On the Fellowship of Wise Men (§17)

“I have thus answered your demand, although it came under the head of subjects which I include in my volumes On Moral Philosophy. Reflect, as I am often wont to tell you, that there is nothing in such topics for us except mental gymnastics. For I return again and again to the thought: “What good does this do me? Make me more brave now, more just, more restrained! I have not yet the opportunity to make use of my training; for I still need the physician.”