Genre and place in the book. A continuation of the providential line of 04-09: where 4.9 said that Nature is of necessity bound to produce what benefits the Whole, 4.10 specifies what kind of order this is — not merely causal but just, assigning to each according to desert. And from this follows a practical conclusion: in every act, be good.

"Everything justly." πᾶν τὸ συμβαῖνον δικαίως συμβαίνει. Marcus distinguishes two levels: (1) κατὰ τὸ ἑξῆς — by causal sequence (all is linked in a chain, fate); (2) κατὰ τὸ δίκαιον — by justice, "as if by one who assigns to each according to desert (κατ' ἀξίαν)." The second is stronger than the first: the world is not merely determined but well-ordered for the good — which is DOGMAprovidence. The formula of "one who distributes by ἀξία" repeats verbatim Chrysippus' definition of justice — ἐπιστήμη ἀπονεμητικὴ τῆς ἀξίας ἑκάστῳ (see dikaiosyne): the cosmic order behaves like a just distributor. (Note: ἀξία here is "desert, merit" in the sense of distribution, not "the value of an indifferent" — which is why the value-term card is not tagged.)

The imperative: be good. The second half turns from contemplation to action: παραφύλασσε (EXERCISEobserve) and "whatever you do, do it σὺν τῷ ἀγαθὸς εἶναι" — together with being TERMgood, and good "in the proper sense" (καθὸ νενόηται ἰδίως ὁ ἀγαθός) — that is, morally, not "good at something." This is the strict Stoic sense of the good: the only genuine good is virtue (cf. DOGMAvirtue-is-sufficient). "ἐπὶ πάσης ἐνεργείας σῷζε" — keep this in every action: the formula of the discipline of action, secured by EXERCISEattention.

The link between the two halves. The logic is plain: since the world-order is just (providence), the only thing I am answerable for is to be good in my own acts. Cosmic justice removes the care for the external outcome and leaves a single task — one's own ἀγαθότης.

The disciplines. The principal one is action (be good in every act). The secondary is assent (the judgement that "everything happens justly").

Parallels. The providential, just order — 04-09; 02-03; Med. 10.6; 12.14. Justice as distribution by desert — Chrysippus' definition (SVF III 264; DL 7.92–94; see dikaiosyne). To act good in everything — 02-05 (the four virtues, incl. δικαιότης); Med. 6.2; 7.69. The good "in the proper sense" — 03-06; cf. DOGMAvirtue-is-sufficient.