Passage
Aristotle, De Insomniis (DIORISIS sentence 38)
grc aristotle de insomniis
τοῦ δὲ μὴ ἀπιέναι ταχέως ἐκ τῶν καινῶν κατόπτρων αἴτιον τὸ καθαρὸν εἶναι καὶ λεῖον διαδεύται γὰρ διὰ τῶν τοιούτων καὶ εἰς βάθος καὶ πάντῃ διὰ μὲν τὸ καθαρὸν εἰς βάθος διὰ δὲ τὸ λεῖον πάντῃ.