A fork with three prongs, not two. Marcus's disjunction is usually twofold: atoms or providence — 4.27, 6.10, 7.32, 9.39, 10.6. Here there are three members, and the middle one is inserted precisely because it does not reduce to either extreme: (1) ἀνάγκη εἱμαρμένης — the necessity of fate, an order ἀπαράβατος, "not to be overstepped"; (2) πρόνοια ἱλάσιμος; (3) φυρμὸς εἰκαιότητος ἀπροστάτητος — "a welter of randomness, with no one standing at its head."

A word one does not expect from a Stoic. ἱλάσιμος means "able to be propitiated," and it comes from the language of cult (ἱλάσκομαι, to appease a god with sacrifice). A providence open to entreaty is not an impersonal logos but someone addressed. And the answer given to that branch matches: not "pray," but ἄξιον σαυτὸν ποίησον — "make yourself worthy of the help." The prayer is converted into a quality of the petitioner.

Not one branch is refuted. Marcus does not choose — he fits each branch with its own practical conclusion, and all three turn out to be liveable. This is his standard move (cf. 12.5, where the question of an afterlife is likewise left open): steadiness is secured not by settling the metaphysical dispute but by finding that on any outcome one does the same thing.

The third branch is the interesting one. Chaos is not refuted but outlived. Ἀσμένιζε — "be glad, be content": in the midst of a κλύδων (a sea-swell, a surge) you have τις νοῦς ἡγεμονικός, "some mind that leads." And then a concession made without bargaining: let the surge carry off the TERMσαρκίδιον, the TERMπνευμάτιον, τἄλλα — the familiar triad of 12.3, of which the first two members are surrendered. τὸν γὰρ νοῦν οὐ παροίσει — the entry breaks off there, and that is the whole of its conclusion. The governing discipline is desire, the sustaining one assent.