Plutarch, Moralia Dialogue on Love 765 a-b
“When we are sent back there, love does not come near our soul through its own devising but through the body. Just so, teachers of geometry, when their students are not yet capable of comprehending thoughts of the incorporeal or the concepts of immutable essence, they make shapes, manipulable and visible representations of spheres, cubes, and dodecahedrons to give them. In this way, heavenly love creates beautiful mirrors of the beautiful things, mortal versions of the divine, changeable manifestations of the unchanging, and merely sensible representations of pure thought.
By creating these things in the shape and color and image of the beautiful people in their youth, Love moves our memory carefully, and it is kindled first by these things.”
Ἐνταῦθα δὲ πάλιν πεμπομένων αὐτῇ μὲν οὐ πλησιάζει ψυχῇ καθ᾿ ἑαυτήν, ἀλλὰ διὰ σώματος. ὡς δὲ γεωμέτραι παισὶν οὔπω δυναμένοις ἐφ᾿ ἑαυτῶν τὰ νοητὰ μυηθῆναι τῆς ἀσωμάτου καὶ ἀπαθοῦς οὐσίας εἴδη πλάττοντες ἁπτὰ καὶ ὁρατὰ μιμήματα σφαιρῶν καὶ κύβων καὶ δωδεκαέδρων προτείνουσιν· οὕτως ἡμῖν ὁ οὐράνιος Ἔρως ἔσοπτρα καλῶν καλά, θνητὰ μέντοι θείων καὶ ἀπαθῶν παθητὰ καὶ νοητῶν αἰσθητὰ μηχανώμενος ἔν τε σχήμασι καὶ χρώμασι καὶ εἴδεσι νέων ὥρᾳ στίλβοντα δείκνυσι καὶ κινεῖ τὴν μνήμην ἀτρέμα διὰ τούτων ἀναφλεγομένην τὸ πρῶτον.