Genre and place in the book. The famous "do few things" — but with a correction. Marcus takes Democritus's maxim and refines it, turning a quantitative counsel into a qualitative one.
Democritus's premise. PERSONDemocritus (DK 68 B3, preserved in Plutarch, On Tranquillity of Mind 465c): one who would have εὐθυμία (cheerfulness, tranquillity — the goal of his ethics) should do few things, not exceeding his own nature. Marcus quotes the opening: "Ὀλίγα πρῆσσε…".
Marcus's correction: not "few" but "necessary." μήποτε ἄμεινον — "would it not be better" to do the necessary (τἀναγκαῖα) and what the TERMreason of a DOGMAbeing social by nature (φύσει πολιτικὸν ζῷον) chooses? Then the tranquillity is twofold: that of doing well (καλῶς) and that of doing few things (ὀλίγα). The correction is not pedantry: bare reduction can be done badly too; the criterion is not number but necessity and social fitness.
The technique: "is this necessary?" παῤ ἕκαστα — at each thing, remind yourself: μήτι τοῦτο τῶν οὐκ ἀναγκαίων; — is this one of the unnecessary things? This is the self-check of EXERCISEattention. Most of what we say and do is unnecessary; remove it and you become "more at leisure and less disturbed" (εὐσχολώτερος, ἀταρακτότερος).
Not only acts but impressions. A nicety at the close: one must remove not only unnecessary acts but unnecessary TERMimpressions (φαντασίας) — for idle acts follow upon idle impressions. The discipline of assent (control of the φαντασίαι) feeds the discipline of action: cut away the superfluous in the head, so as not to breed the superfluous in deeds.
The disciplines. The principal one is action: to do the necessary and the socially due. The secondary is assent: to cut away unnecessary impressions at the source.
Parallels. Democritus's "do few things" — DK 68 B3 (Plutarch, De tranq. 465c). To cut the unnecessary, asking "is it necessary?" — 03-04; 04-18; Med. 2.5. To remove unnecessary impressions, not only acts — 04-22; Med. 7.29 (see TERMphantasia). The human as a being social by nature — Aristotle Pol. 1253a; 02-01; 02-16 (see DOGMAoikeiosis).