Miscellanies 1.15.68

And it seems to me that, perceiving the great benefit that comes through the wise, they both revered these men and philosophized publicly. All the Brahmins, the Odrysians, the Getae, and the race of the Egyptians theologized exactly about their teachings, as did the Chaldeans and the Arabians called Happy, and those who lived in Palestine, and not the least part of the Persian race, and countless other races besides. Plato is clearly found always honoring the barbarians, remembering that both he and Pythagoras learned most and the noblest of their doctrines among barbarians. That is why he spoke of “races of barbarians,” knowing of races of barbarian philosophers; and in the Phaedrus he shows the Egyptian king wiser even than Thoth, whom he knows to be Hermes. And in the Charmides he shows that he knows certain Thracians who are said to make the soul immortal.