He is the opponent of Ahriman, the spirit of evil, both being sprung from Eternity, or, according to another version, Ahriman being the offspring of a moment of doubt on the part of Ormazd
He is represented as a bearded man inclosed in a winged circle, a conception probably derived from the Assyrian representations of Ashur
The supreme deity, the principle of good, creator of the world, and guardian of mankind