These statements do not amount to much. Yet we find the tradition maintained from the pupils of Plato down to Agathias, that Zoroaster founded the doctrine of the Magians; Diodorus, Plutarch, and Dio mention the intercourse of Zoroaster with the good spirit or the deity. Diodorus calls him an Arian, _i.e._ an inhabitant of Eastern Iran. Hermippus, Trogus Pompeius, Kephalion, Theon, Arnobius, and Eusebius speak of him as a Bactrian, and the king of the Bactrians, and represent him as fighting with Ninus or Semiramis, which is also asserted by Moses of Khorene.[134] Hence in the last two centuries B.C. it must have been known in the West that Zoroaster belonged to the East of Iran, and thus he was brought into connection with the most prominent fact known in the history of Bactria, the contest of the Bactrians against Ninus and Semiramis. This story, as we said, comes from the Medo-Persian Epos, and moreover the Epos did not authorise this connection of Ninus and Zoroaster. The opponent of Ninus, who reigned over Bactria, was, according to Diodorus, Oxyartes or Exaortes (p. 20). The fact that Zoroaster was the most important name in the antiquity of Iran among western nations obviously induced Syncellus to put him at the head of the supposed ancient Median dynasty. If Zoroaster, as Pliny and Plutarch think, lived only on milk and cheese, and passed thirty years in the wilderness, these are merely traits taken from the lives of the Brahman ascetics. The story in Dio Chrysostom, that Zoroaster came unharmed from the fire, and the opposite statements of the Chronicle of Alexandria and of Suidas, that he brought down fire from heaven and was consumed by it, or struck by lightning, contain traits which have obviously sprung from the importance which the doctrine of Zoroaster and the Magians ascribe to the worship of fire, and from the division between the fire of lightning and earthly fire, of which we shall speak below. The narrative of Eubulus is founded on the mysteries of Mithra, which came into the West in the first century B.C.[135] These mysteries are due to the confusion of the Mithra of the Iranians with the sun-god of the Syrians; the mystæ were consecrated in caves, or in places called caves, and there underwent their probation. As the god of light and the soul Mithra slays in the cave, that is in the world of gloom and matter, the bull which is the symbol of matter, as opposed to light, in its creative power, and conveys the soul, the side of man akin to light, out of the gloom of matter through the heaven of the fixed stars, and then through the heaven of the planets, to the light.[136] Ammianus Marcellinus and Agathias have better information about Zoroaster. They are aware that he stands in some relation to Hystaspes. Ammianus, though he expressly describes Zoroaster as a Bactrian, puts Hystaspes the well-known father of Darius, as the supporter of the doctrine of the Magians, in the place of the Vistaçpa of the Avesta, who opens a wide path for the teaching of Zoroaster; Agathias, on the other hand, expresses himself with greater circumspectness; he cannot decide whether the father of Darius or some other Hystaspes is meant.