Callistratus, Descriptions of Statues 2.1

οὐ ποιητῶν καὶ λογοποιῶν μόνον ἐπιπνέονται τέχναι ἐπὶ τὰς γλώττας ἐκ θεῶν θειασμοῦ πεσόντος, ἀλλὰ καὶ τῶν δημιουργῶν αἱ χεῖρες θειοτέρων πνευμάτων ἐράνοις ληφθεῖσαι κάτοχα καὶ μεστὰ μανίας προφητεύουσι τὰ ποιήματα.

It is not only poets’ and prose-writers’ skills that are inspired when divine frenzy falls on their tongues from the gods: the hands of sculptors too, when seized by the diviner inspirations which are lent them, utter forth creations that are possessed and filled with madness.