Not an entry but an inventory. There is not one finite verb in the Greek: four objects in the accusative, separated by colons, under a single impersonal δεῖ at the head. This is not a train of thought but a list for contemplation — something to be returned to. Rogovin and Long both supply "consider," which is not in the text; the addition is right in sense and still changes the genre: what Marcus wrote is a bare schedule.

The question is not "when" but "in what state." ὁποῖον δεῖ καταληφθῆναι ὑπὸ τοῦ θανάτου — "in what condition one must be overtaken by death." Καταλαμβάνω is "to catch, to seize, to come upon unawares": death here is the captor, and the only thing that depends on you is the condition it finds you in. Cf. 12.1, where the same position is set out at length: at the going-out, to honour only the ruling part and the divine within.

The word worth reading in Greek. ἀχάνεια is from χαίνω, "to yawn, to gape": not "infinity," not "eternity," but a gape, an open jaw. And it gapes both ways, ὀπίσω καὶ πρόσω. The same root stands in 9.32: ἀχανὲς τὸ πρὸ τῆς γενέσεως, "gaping is the time before birth," while the span from birth to dissolution is called βραχύ.

The order of the four objects. It runs from the inside outward and upward in scale: (1) my condition at the hour of death; (2) the shortness of my life; (3) the gape of time on either side of it; (4) the feebleness of all matter. The first is the only item in which there is an "I" and something to be done; the other three are the frame within which the first acquires any weight at all. This is the very structure of the EXERCISEview from above: not consolation by smallness, but the placing of one's single task at its actual size. The governing discipline is desire, the sustaining one assent.