in any detail. The opposition of a good god, Ormuzd, the god of light, truth, frankness, and the sun, and a bad god, Ahriman, god of secrecy, cunning, diplomacy, darkness, and night, formed a very central part of his religion. As we find it in history, it is already surrounded by a ceremonial and sacerdotal system; it has no images, but it has priests, temples, and altars, on which burn a sacred fire and at which sacrificial ceremonies are performed. Among other distinctive features is its prohibition of either the burning or the burial of the dead. The Parsees of India, the last surviving Zoroastrians, still lay their dead out within certain open towers, the Towers of Silence, to which the vultures come.
Under the Sassanid kings from Ardashir onward (227), this religion was the official religion; its head was the second person in the state next to the king, and the king in quite the ancient fashion was supposed to be divine or semi-divine and upon terms of peculiar intimacy with Ormuzd.
But the religious fermentation of the world did not leave the supremacy of Zoroastrianism undisputed in the Persian Empire. Not only was there a great eastward diffusion of Christianity, to which we have already given notice, but new sects arose in Persia, incorporating the novel ideas of the time. One early variant or branch of Zoroastrianism, Mithraism, we have already named.[1] It had spread into Europe by the first century B.C., after the eastern campaigns of Pompey the Great. It became enormously popular with the soldiers and common people, and, until the time of Constantine the Great, continued to be a serious rival to Christianity. Indeed, one of his successors, the Emperor Julian (361-363), known in Christian history as "Julian the Apostate," made a belated attempt to substitute it for the accepted faith.[2] Mithras was a god of light, "proceeding" from Ormuzd and miraculously born, in much the same way that the third person in the Christian Trinity proceeds from the first. Of this branch of the Zoroastrian stem we need say no more. In the third
