The three disciplines in one formula. This is one of Pierre Hadot's central texts: a rational nature "fares well" (εὐοδεῖ) by fulfilling exactly three conditions, and they map precisely onto the three disciplines. (1) Assent: "in its TERMimpressions, to assent to nothing false or unclear" (μήτε ψευδεῖ μήτε ἀδήλῳ συγκατατιθεμένη) — control of judgment. (2) Action: "to direct its TERMimpulses to TERMsocial acts alone" (ἐπὶ τὰ κοινωνικὰ ἔργα). (3) Desire: "to make desire and aversion bear DOGMAonly on what is in our power" (τῶν ἐφ’ ἡμῖν μόνων) and DOGMA"to welcome all that the common nature assigns" (τὸ ὑπὸ τῆς κοινῆς φύσεως ἀπονεμόμενον ἀσπαζομένη). The three fields of a rational being's freedom are set out at once; cf. the parallel 9.6 (true judgment, social action, acceptance).
The leaf and the plant. The human being is a "part" (μέρος) of the common nature, as "the nature of the leaf is part of the nature of the plant." But the analogy is at once qualified (πλήν): the leaf is part of a nature senseless, irrational, and impedable (ἐμποδίζεσθαι δυναμένης), whereas TERMman's nature is part of a nature unimpedable (ἀνεμπόδιστος), rational and just. Hence the inalienability of inner freedom: the external can obstruct a leaf, but not rational assent (cf. the DOGMAdichotomy). The relation of part and whole is the unity of the cosmos at the level of the individual.
The just apportionment. The "justice" of nature is specified as a proportionate distribution (κατ’ ἀξίαν): of time, substance, cause, activity, incident — "equally and by desert." And a methodological rider: seek the equality not by comparing one single trait with another, but as a whole — the totality of one against the totality of another (cf. 8.6: ἴσαι αἱ ἀπονεμήσεις). The strict terms by the word are φύσις, φαντασία, ὁρμή, κοινωνικόν; συγκατατιθεμένη carries assent, but the verbal form (not the noun-lemma) is not entered among the terms. The governing discipline is assent (the first of the three conditions), the sustaining one action; the field of desire is opened in the text on equal footing.