Genre and place in the book. The third entry in the catalogue of debts, this one to Marcus's mother, Domitia Lucilla Minor (see the PERSONcard). After the exceptional construction of 01-02 (whose source of indebtedness is mediated — δόξα καὶ μνήμη), Marcus returns to the standard formula of Book I, "παρὰ τοῦ X." This is significant: he knew his mother personally — she outlived his father and his grandfather and lived into his adult years (Domitia Lucilla died approximately 155–161 CE). Where 01-02 gives a mediated ethical inheritance, 01-03 gives a direct one.

Four virtues. This is the most content-dense of the opening entries of Book I — four subjects in a single enumeration, each calling for comment.

1. τὸ θεοσεβές — piety, reverent regard for the gods. From θεοσέβεια (θεός + σέβομαι, "to revere"). In the context of a Roman matron, this is domestic pietas — the observance of family religious rites, the household cult of the Lares and Penates, participation in public festivals. Stoically it connects with the doctrine of gratitude to the gods, but Marcus, in describing his mother, stays in the everyday, non-school register.
2. τὸ μεταδοτικόν — substantivised form from μεταδοτικός ("inclined to share, to give of one's own"), from μεταδίδωμι ("to give over a portion of"). Particularly weighty in the case of Domitia Lucilla: she was one of the wealthiest heiresses of her generation (see below on the figlinae). The generosity of the rich is not just a virtue but a choice: she had something and out of which to give. Cf. Sen. De beneficiis 1–2 on liberalitas as a deliberate disposition rather than an impulse.
3. τὸ ἀφεκτικὸν οὐ μόνον τοῦ κακοποιεῖν, ἀλλὰ καὶ τοῦ ἐπὶ ἐννοίας γίνεσθαι τοιαύτης — "abstaining not only from doing what is wrong but even from coming to such a thought." This formula is the most quoted line of Book I and one of the programmatic places of the Meditations as a whole. See the separate point below.
4. τὸ λιτὸν κατὰ τὴν δίαιταν καὶ πόρρω τῆς πλουσιακῆς διαγωγῆς — simplicity in one's δίαιτα (mode of living in the wide sense: food, daily order, household habits) and distance from πλουσιακὴ διαγωγή ("the rich man's manner of bearing himself" — διαγωγή here means a social modus of existence, how exactly one carries oneself in the society of one's stratum). Long translates flatly "habits of the rich," losing the nuance of social display.

The interiorisation of ethics (ἀφεκτικόν of thoughts). The thesis that not only the act but the very arising of the thought is subject to ethical assessment is, for ancient ethics, characteristically Stoic. Most pre-Stoic moral systems (including Aristotle's) hold to the boundary of the act: responsibility begins where the action is accomplished, and inner states are either preconditions (character) or consequences (passion), but not directly imputable. The Stoics shift the boundary: responsibility begins already at the level of assent (συγκατάθεσις) to an impression — that is, before the impression grows into an action. Epictetus elaborates the theme in Disc. 2.18 ("How we should combat impressions"), 4.4 ("keep watch over what is in you").

That Marcus ascribes this discipline to his mother, and not to a philosopher-teacher, matters on two counts. (a) This is the first appearance in the Meditations of the programme of inner watchfulness (see the exercise προσοχή), and it is ascribed not to schooled discipline but to a family habitus. (b) It means that for Marcus the Stoic interiorisation was not an intellectual discovery of his mature years — it was part of how he was raised from childhood, before the systematic instruction with Junius Rusticus, Apollonius, and Sextus.

Simplicity in the midst of wealth. Domitia Lucilla inherited the figlinae — the brick and tile workshops on the right bank of the Tiber by the Via Tiburtina, whose products supplied most of the major building sites of second-century Rome and its surroundings (the stamps figlinae Domitiae Lucillae and their derivatives are archaeologically attested in great numbers). The fortune was enormous, and in the proper social order, a corresponding πλουσιακὴ διαγωγή was expected of a Roman matron of her rank — a large house, a numerous familia urbana, demonstrative gifts, private villas, expensive imported foodstuffs at table. That Lucilla did not follow this standard is a detail Marcus preserved in memory as ethically remarkable. Stoically, this illustrates the right handling of ἀδιάφορα: wealth is neither bad nor good, but used with conspicuous simplicity it bears witness that προαίρεσις is free of attachment to it. Marcus, on inheriting his mother's fortune and becoming emperor, continues this disposition — cf. Med. 6.30, where he reminds himself "to live, as far as possible, at court in the simplest way."

Family vocabulary, not school vocabulary. Worth noting: none of the four qualities — θεοσεβές, μεταδοτικόν, ἀφεκτικόν, λιτόν — is, strictly, a Stoic technical term from any of the canonical classifications of the virtues. They are Roman household virtues in a Greek dress: pietas, liberalitas, abstinentia (or continentia), frugalitas. Marcus, as in 01-02 (where he chooses ἀρρενικόν over the canonical ἀνδρεία), consistently avoids school jargon when speaking of family figures. This appears to be a deliberate strategy: he describes the family inheritance in the vocabulary in which it actually functioned within the family circle, not as reconstructed Stoically after the event.

Biographical note. Domitia Lucilla (the younger) was the daughter of P. Calvisius Tullus Ruso (consul 109); her full name Marcus actually uses in his epistolary practice only in oblique forms. Educated, she spoke and wrote Greek fluently (Fronto's Greek letters survive addressed to her, separately from his letters to Marcus), and she received Greek philosophers and rhetoricians in her own house. The date of her death is not securely fixed — Birley cautiously gives a range 155–161 CE. For more, see the PERSONcard. (The transliteration of her father's name in Rogovin's note is "Kal'vizii," not "Kal'zizii" as appears in some electronic copies of the text: that is a network OCR artefact; Rogovin himself has the correct form.)

Parallels. Med. 6.30 (the long portrait of Antoninus Pius) contains the maxim "to live at court as simply as possible" — Marcus-the-emperor preserving in new circumstances the domestic style of his mother. Med. 5.16 is the canonical place on how habitual thoughts shape the soul: "τοιαῦτα γάρ τις πολλάκις φαντασθῇ, τοιαύτη ἔσται αὐτῷ ἡ διάνοια· βάπτεται γὰρ ὑπὸ τῶν φαντασιῶν ἡ ψυχή" ("such as the impressions one frequently has, such will one's mind be; for the soul is dyed by its impressions"). This is the direct Stoic background for the mother's "abstaining not only from deeds but even from thoughts": the control operates at the level of ἔννοιαι / φαντασίαι — because an unexamined thought "dyes" the soul. Epictetus on the same point — Disc. 2.18 ("How we should combat impressions," the classic locus). Seneca on simplicity in the midst of wealth — Ep. 17–18 (the general theme: philosophy is not dependent on a fortune; the practice of voluntary austerity is useful as training). Fronto's correspondence — Ad M. Caes., passim: letters addressed to Domitia Lucilla in Greek, and regular references to Marcus's mother in his letters to Marcus himself, an important external source on her figure. The best modern study of "figlinae Domitiae Lucillae" remains T. Helen, Organization of Roman Brick Production in the First and Second Centuries A.D. (Helsinki, 1975).