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Book I Chapter 20 · I.20.7.2–I.20.7.4
Ancient Greek
p. 4807 ⟨Ἀρείου Διδύμου⟩ · 2
Τούτων δὲ τὴν κατ’ ἀλλοίωσιν περὶ τὴν οὐσίαν γίνεσθαι, τὰς δ’ ἄλλας τρεῖς περὶ τοὺς ποιοὺς λεγομένους τοὺς ἐπὶ τῆς οὐσίας γινομένους. Ἀκολούθως δὲ τούτοις καὶ τὰς γενέσεις συμβαίνειν. Τὴν γὰρ οὐσίαν οὔτ’ αὔξεσθαι οὔτε μειοῦσθαι κατὰ πρόσθεσιν ἢ ἀφαίρεσιν, ἀλλὰ μόνον ἀλλοιοῦσθαι, καθάπερ ἐπ’ ἀριθμῶν καὶ μέτρων συμβαίνειν.
7 ⟨Ἀρείου Διδύμου⟩ · 3
Ἐπὶ ⟨δὲ⟩ τῶν ἰδίως ποιῶν, οἷον Δίωνος καὶ Θέωνος, καὶ αὐξήσεις καὶ μειώσεις γίνεσθαι. Διὸ καὶ παραμένειν τὴν ἑκάστου ποιότητα ἀπὸ τῆς γενέσεως μέχρι τῆς ἀναιρέσεως, ⟨ὡς⟩ ἐπὶ τῶν ἀναίρεσιν ἐπιδεχομένων ζῴων καὶ φυτῶν καὶ τῶν τούτοις παραπλησίων.
7 ⟨Ἀρείου Διδύμου⟩ · 4
Ἐπὶ δὲ τῶν ἰδίως ποιῶν φησι δύο εἶναι τὰ δεκτικὰ μόρια, τὸ μέν τι κατὰ τὴν τῆς οὐσίας ὑπόστασιν, τὸ δέ ⟨τι⟩ κατὰ τὴν τοῦ ποιοῦ. Τοῦτο γάρ, ὡς πολλάκις ἐλέγομεν, τὴν αὔξησιν καὶ τὴν μείωσιν ἐπιδέχεσθαι·
Stobaeus, Volume I: Book I Chapter 20
p. 4817 Posidonius: Substance and qualified things
Of these, change by alteration occurs in substance, while the other three occur in what are called qualified things, which come to be in substance. Corresponding processes of generation also take place. For substance neither increases nor decreases by addition or subtraction, but is only altered, as happens with numbers and measures.600
7 Posidonius: Individual persistence
⟨But⟩ individually qualified things, such as Dion and Theon, undergo both increase and decrease. Thus each one’s quality persists from its coming into being until its destruction, ⟨as⟩ in animals, plants, and similar things that admit of destruction.601
7 Posidonius: Two constituents
In individually qualified things, he says, there are two receptive constituents: one in respect of the subsistence of substance, the other ⟨one⟩ in respect of the subsistence of the qualified thing. For this latter, as we have often said, admits increase and decrease.602
Socrates
Reading Stobaeus, Volume I · Book I Chapter 20 · I.20.7.2–I.20.7.4
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Socrates will begin with this book and its sources.About This Reading Edition
Stobaeus gathered Greek philosophy and poetry for his son Septimius. Volume I presents the dedication testimony, On Arithmetic, Book I through chapter 60, and the ancient contents of all four books. This complete bilingual edition includes an introduction and 2,117 explanatory notes.
Historical Text and Translation
The Greek follows Curt Wachsmuth’s 1884 Volume I, checked against the supplied scan. Gaps, lost-chapter headings, and uncertain attributions remain visible. Chapter 2 includes a labeled proposed reconstruction. The appendix outlines Books I–IV; the full texts of Books II–IV are outside this volume. Reader pages preserve the companion PDF’s numbering.
About Diotimos Editions
Diotimos Editions prepared this independent English translation directly from the Greek. Prose and verse retain their distinct forms, with mixed passages preserving their quoted verse. Every passage is paired with its Greek and identified by the edition’s reference number. All 2,117 notes remain linked to their passages, with continuous numbering across the introduction and text.
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Stobaeus’s ancient Greek work and Wachsmuth’s 1884 printing are in the public domain. The independent English translation, introduction, and explanatory notes are © 2026 Diotimos Editions. The complete supplied edition is available as PDF, EPUB, Word, and Markdown. The PDF retains the fixed page locations used by the companion lexicon.