Miscellanies 1.15.67

So Plato thinks that there are philosophers among the barbarians too, while Epicurus, on the contrary, supposes that only Greeks can philosophize. And in the Symposium, praising the barbarians as having practiced it outstandingly, Plato says … “and others elsewhere in many places, among Greeks and among barbarians, for whom many temples have already arisen on account of such children.” The barbarians have clearly especially honored their lawgivers and teachers, calling them gods. For they suppose, according to Plato, that good souls, leaving the region above the heavens, endured to come into this Tartarus, and, taking a body, shared in all the evils of generation, caring for the human race; and they laid down laws and proclaimed philosophy, “than which no greater good ever came or will come to the human race from the gods.”