Genre and place in the book. The sixth passage is one of the most doctrinally explicit in Book III: a procedure for the choice of the supreme good. After the portrait of 03-04 and the rule of life of 03-05, Marcus formulates the fundamental choice: is there anything better than virtue and the inner daimon? If yes — follow it; if no (and this is the true answer) — give place to nothing else.

Structure — a conditional dilemma (εἰ μὲν… εἰ δὲ…).

1. The hypothetical concession (εἰ μὲν). IF you find in life anything better than [the four virtues + the self-sufficient mind acting by right reason + the acceptance of your lot] — then turn to it with your whole soul. A rhetorical move: Marcus grants the premise so that the conclusion becomes inescapable. What would have to be surpassed: δικαιοσύνη (justice), ἀλήθεια (truth), σωφροσύνη (temperance), ἀνδρεία (courage) — the tetrad of cardinal virtues (with ἀλήθεια in the place of the usual φρόνησις/wisdom) — plus the "self-sufficiency of the mind" (τὸ ἀρκεῖσθαι ἑαυτῇ τὴν διάνοιαν) in two domains: acting κατὰ τὸν ὀρθὸν TERMλόγον (by right reason) and accepting τὰ ἀπροαιρέτως ἀπονεμόμενα ἐν τῇ TERMεἱμαρμένῃ (what fate allots outside our choice).
2. The real answer (εἰ δὲ). BUT if nothing is better than the inner daimon (ὁ ἐνιδρυμένος ἐν σοὶ TERMδαίμων) — described by four participles: (a) having subordinated its own TERMimpulses (ὁρμάς) to itself, (b) examining the TERMimpressions (φαντασίας ἐξετάζων), (c) having detached itself from "the persuasions of the senses" (αἰσθητικῶν πείσεων), "as PERSONSocrates said," (d) having submitted itself to the gods and caring for human beings — then give place to nothing else. The daimon's four marks span the three disciplines: the taming of impulses (desire/action), the examining of impressions (assent), detachment from the senses (assent/purification), submission to the gods + care for human beings (piety + the social).
3. The danger of rivals (γάρ). It is οὐ θέμις (not lawful / not sanctioned) for anything ἑτερογενές (of another kind) to be set as a rival to the λογικὸν καὶ πολιτικὸν ἀγαθόν (the rational and civic good): not the praise of the many, nor office (ἀρχαί), nor wealth (πλοῦτος), nor the enjoyment of TERMpleasures. These "indifferents" (adiaphora), even if they seem to fit in "for a little," "suddenly take command" (κατεκράτησεν ἄφνω) and sweep one away. A psychological warning: grant the external even a slight value-as-good and it colonizes the whole soul. Hence the all-or-nothing: μηδενὶ χώραν δίδου ἑτέρῳ.
4. The decision-rule + the criterion. σὺ δὲ ἁπλῶς καὶ ἐλευθέρως ἑλοῦ τὸ κρεῖττον — "simply and freely choose the better, and hold to it." Then a dialogical objection: "κρεῖττον δὲ τὸ συμφέρον" — "but the better is the beneficial." Marcus's answer: distinguish what is beneficial to you as rational (ὡς λογικῷ) from as an animal (ὡς ζῴῳ). Keep the former; if it is only the animal-benefit, "declare it" (ἀπόφηναι) and guard your judgement ἀτύφως (without conceit / self-delusion). Only let the examination (ἐξέτασις) be made ἀσφαλῶς (securely).

Key analyses.

• The virtue-tetrad. δικαιοσύνη / ἀλήθεια / σωφροσύνη / ἀνδρεία — the Stoic four virtues, with ἀλήθεια ("truth/truthfulness") in the place usually held by φρόνησις. Only TERMdikaiosyne has its own card; the tetrad as a whole is the content of ἀρετή. The argument: these + the self-sufficient mind are the good, and nothing surpasses them → DOGMAvirtue-is-sufficient.
• The mind's two domains = the dichotomy of control. Acting by right reason (what is up to us) + accepting what fate allots (what is not up to us) — this is precisely the DOGMAdichotomy of control. The word ἀπροαιρέτως ("non-prohairetically") is the technical marker of the προαίρεσις-distinction in its negative form: the realm not subject to the choosing will. (Note: the noun προαίρεσις itself is not in the text — only the privative adverb ἀπροαιρέτως — so the doctrine is engaged via its complement.)
• The inner daimon and its four works. Here Marcus uses the actual word TERMδαίμων (unlike θεός in 03-05). The four participial marks are a compact description of the right functioning of the ruling part across all the disciplines.
• "As Socrates said" — detachment from the senses. The reference (ὡς ὁ Σωκράτης ἔλεγεν, τῶν αἰσθητικῶν πείσεων ἑαυτὸν ἀφειλκυκότος) points to the Platonic Socrates of the Phaedo, where philosophy is the soul's withdrawal (ἀπαλλαγή, χωρισμός) from the body and the deceptions of the senses (Phd. 65a–67b; 83a). Marcus folds this Socratic-Platonic ascesis into the Stoic discipline of assent (the examining of φαντασίαι). See PERSONsocrates.
• οὐ θέμις — the religious register. "It is not θέμις (divinely sanctioned) for anything heterogeneous to rival the rational-civic good": to value externals as goods is not merely an error but a quasi-impiety against the order of value. An echo of the "priest of the gods" of 03-04.
• The colonization warning. πάντα ταῦτα… κατεκράτησεν ἄφνω καὶ παρήνεγκεν — externals, given even a slight footing "as goods," "suddenly take command and carry one off." Acute moral psychology: there is no stable "little bit" of valuing wealth/praise as good.
• The criterion: συμφέρον, rational vs animal. The dialogical "κρεῖττον δὲ τὸ συμφέρον" is the Stoic identification of the good with the genuinely beneficial. Marcus refines it: beneficial to whom — to you as rational or as animal? The good proper to a human being is the rational-civic good; animal-"benefits" (pleasure and the rest) are not the good. And guard the judgement ἀτύφως — "without τῦφος," the Cynic-Stoic word for vain self-delusion (cf. monimus, 02-15/02-17): make the value-examination soberly and securely. The closing word returns to method: the whole choice rests on a careful ἐξέτασις — the discipline of assent.

The disciplines. The leading one is desire (the value-ranking: what is the good; reject externals-as-goods; accept the fated lot). The secondary is assent (the examining of impressions, the security of judgement, the rational criterion). Action is also woven in (the rational-civic good, care for human beings).

Stylistics. The εἰ μὲν… εἰ δὲ dilemma-frame forcing the conclusion. The four-participle portrait of the daimon. The dialogical objection-and-answer ("κρεῖττον δὲ τὸ συμφέρον"). The piling-up of rejected externals (praise / office / wealth / pleasure). The sacral οὐ θέμις. The terse closing imperatives (τήρει, ἀπόφηναι, φύλασσε).

Parallels. The four virtues — DL VII 92; SVF III 262 ff.; arete. Virtue as the only/supreme good — Med. 5.16; 6.16; 8.1; DOGMAvirtue-is-sufficient. The dichotomy (ἀπροαίρετα) — Epictetus Ench. 1; Disc. 1.1; DOGMAdichotomy-of-control. "Socrates drawing the soul away from the senses" — Plato Phd. 65a–67b; 83a. εἱμαρμένη — Med. 2.3; 4.26; 5.8; 10.5; Chrysippus (SVF II 912 ff.). ἀτύφως / τῦφος — Monimus (02-15), Med. 2.17. The good = the beneficial (συμφέρον) — DL VII 94, 98. The rejection of praise/power/wealth/pleasure as goods — Med. 4.19; 5.12; 8.1.