Place in the book. The sixth passage is about the manner of doing good: not what to do, but how. The ideal is an unselfconscious virtue, "like the vine"; but Marcus at once raises an objection and works through it. The discipline of action (the social deed) with a layer of assent (self-awareness).
Three kinds of benefactor. An ascending scale: (1) the one who, having done a service, at once "enters it on the account" as a debt (λογίσασθαι τὴν χάριν); (2) the one who makes no open claim but inwardly counts the other his debtor (χρεώστης) and "knows what he has done"; (3) the one who "in a way does not even know what he has done" — like a vine that has borne its cluster and seeks nothing more, once it has yielded its own fruit (ἴδιος καρπός). The third is the ideal: good as natural fruit-bearing, without self-accounting.
The vine and the creatures. The horse has run, the dog has tracked, the bee has made honey; the man who has done good "does not call out" (οὐκ ἐπιβοᾶται) but passes on to the next — as the vine bears its cluster again in season. The image of MOTIFcreatures at their work: each fulfils its own and goes on. Cf. Med. 7.73: having done good and seeing it received, "do not look, as fools do, for a third thing — the reputation of a good deed, or a return."
The objection and παρακολούθησις. The interlocutor: but one must be aware! "It belongs to the TERMsocial being to perceive that it acts socially (κοινωνικῶς), and even to wish its partner (κοινωνός) to perceive it too." This appeals to EXERCISEself-tracking — the rational soul's power to notice its own acts. Marcus does not deny it, but: "you have not rightly understood what was said."
The resolution. The subtlety is that the awareness proper to a rational-social being is not the reckoning of merits (types 1–2) but the transparency of the act itself to itself; the demand for recognition is a "plausibility of reasoning" (λογικὴ πιθανότης) — the very thing that leads the first types astray. Rightly understood, "unselfconscious" fruit-bearing cancels neither awareness nor the doing of deeds: "have no fear that you will omit any social act" (ἔργον κοινωνικόν). The ideal is not unconsciousness but unself-regarding clarity.
Discipline and parallels. The principal discipline is action (the unself-regarding social deed); the secondary is assent (self-awareness, EXERCISEπαρακολούθησις). The image is MOTIFcreatures-at-work; the term is TERMkoinonikon. Parallel: Med. 7.73.