Genre and place in the book. A collage of sayings of PERSONHeraclitus under the common frame "always remember" (EXERCISEkeeping ready to hand) — Marcus's most developed treatment of Heraclitus. It joins his physics (the cycle of the elements) and his ethics of wakefulness (to live by the Logos, not as if asleep).
The transformation of the elements. γῆς θάνατος ὕδωρ γενέσθαι… — the death of earth is the birth of water, of water air, of air fire, and back again: the cycle of the TERMelements (earth → water → air → fire), which is itself the very existence of the cosmos. "Death" at any level is only a transformation into the next (cf. 02-03; 04-42).
The Logos that governs the Whole. TERMλόγος, DOGMAτῷ τὰ ὅλα διοικοῦντι — the reason that governs all and is common to all; yet people are "at variance" (διαφέρονται) with it, though they are in communion with it most continuously of all, and what is familiar seems foreign to them. This is the Heraclitean κοινὸς λόγος (B1) — the direct ancestor of the Stoic cosmic Logos (DOGMAunity through a single Logos).
Not as sleepers, not as children. οὐ δεῖ ὥσπερ καθεύδοντας — not to live and speak as if asleep (mechanically, without awareness); οὐ δεῖ ὡς παῖδας τοκεώνων — not to repeat blindly what is inherited "just as we received it" (κατὰ ψιλόν). A call to a waking, conscious life by the Logos — against the somnambulism of habit and unexamined tradition.
Source of the fragments. This very passage is the source of several fragments of Heraclitus: Diels drew from it B71 (he who forgets the way), B72 (the variance with the Logos; the familiar seeming foreign), B73 (not as sleepers), B74 (not as children of one's parents).
The disciplines. The principal one is assent: to keep the teachings ready and to live consciously, awake, not somnambulistically (an examined judgement, not blind habit). The secondary is desire: the cycle of the elements — to be reconciled to transformation as nature's norm.
The exercise. EXERCISEProcheiron: "ἀεὶ μεμνῆσθαι" — to keep these Heraclitean theses ready to hand, prepared for use (the Meditations itself is in part such a notebook).
Parallels. The cycle of the elements — Heraclitus B76; 02-03; 04-42 (cf. TERMstoicheia). The common Logos, estranged from, and the life "as if asleep" — Heraclitus B71–B73; Med. 6.42 (cf. TERMlogos; DOGMAunity-of-cosmos). Not to live by blind habit — Heraclitus B74 (cf. EXERCISEprokheiron).