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Book I Chapter 52 · I.52.7–I.52.9.1
Ancient Greek
p. 16307
Πλάτων συναύγειαν τοῦ μὲν ἐκ τῶν ὀφθαλμῶν φωτὸς ἐπὶ ποσὸν ἀπορρέοντος εἰς τὸν ὁμογενῆ ἀέρα, τοῦ δὲ ἀπὸ τῶν σωμάτων ἀντιφερομένου, τοῦ δὲ περὶ τὸν μεταξὺ ἀέρα, εὐδιάχυτον ὄντα καὶ εὔτρεπτον, συντεινομένου τῷ πυρώδει τῆς ὄψεως. αὕτη λέγεται Πλάτωνι ἡ συναύγεια.
8
Ἀλκμαίων κατὰ τὴν τοῦ διαφανοῦς ἀντίληψιν.
9.1
⟨Διδύμου.⟩
Ἀριστοτέλους. Ὁρᾶν ἡμᾶς κατὰ κίνησιν τοῦ κατ᾽ ἐνέργειαν διαφανοῦς· διαφανὲς δὲ οὐ μόνον εἶναι τὸν ἀέρα ἀλλὰ καὶ τὸ ὕδωρ καί τινα τῶν συνισταμένων ποθέν, οἷον ὕαλον καὶ κρύσταλλον καί τινας τῶν λαμπρῶν λίθων.
Stobaeus, Volume I: Book I Chapter 52
p. 16317 · A conjunction of light
Plato explains sight by a conjunction of light: light flows some distance from the eyes into air of like nature; light from bodies travels to meet it; and light in the intervening air, which readily spreads and changes, is drawn into tension with the fiery element of vision. This is what Plato calls the conjunction of light.1981
8 · The transparent
Alcmaeon explains sight through apprehension of the transparent.1982
9.1 · The transparent medium
⟨Didymus.⟩
Aristotle. We see through a movement of what is actually transparent. The transparent is not only air but also water and certain things formed by combination from some source, such as glass, crystal, and some bright stones.1983
Socrates
Reading Stobaeus, Volume I · Book I Chapter 52 · I.52.7–I.52.9.1
Ask about a concept, passage, contradiction, or connection.
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.
Rights
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.