Light And Dark

Ἀναταολὴν ἔχων ὄνομα Θεὸς, ἔφης, καὶ φῶς ὑπάρχων ἀρπόσιτον, πῶς ἐπὶ δυσμῶν ἐπιβέβηκεν; Ἀνατολὴ αὐτῷ ὄνομα, ἡ ἀναρχος θεότης, ἡ φῶς οὖσα ἀϊδιον. Ἡ δὲ ἐπὶ δυσμῶν ἐπίβασις, ἡ κοινωνία τῆς ἀνθρωπίνης πτωχείας, δύσις οὖσα, καὶ νυκτὶ ἐοικυῖα, εἰ συγκρίνοιτο τῇ ἄνω λαμπρότητι. Ἀσύγκριτα γὰρ ὑπῆρχε τὰ πράγματα πρὶν ἐνώσει αὐτὰ ἐν ἑαυτῷ ὁ τεχνίτης. Ἅγιος Ἰσίδωρος Του Πηλουσιώτου, Βιβλίον Πρῶτον, Ἐπιστολή ΣΜΗ' Δρακοντιῳ Πρεσβυτερῳ Source:  Migne PG 78.333a-b

When God has the name of Dawn and dwells in inaccessible light, you ask how it is that He shall rise over the dusk? 1 I answer: The dawn is the name of the Divinity without beginning, which is eternal light. And the ascent over the dusk is the relation to man's poverty, which is the dusk, and as the night if it is compared with supernal splendor. For these two things were incomparable before their Creator joined them in Himself. Saint Isidore of Pelusium,  Book 1, Letter 248, To Dracontius The Priest 1 Ps 67.5