(43) According to the Persians, there coexisted in eternity two principles. The first of these, Ahura-Mazda, or Ormuzd, was the Spirit of Good. From Ormuzd came forth a number of hierarchies of good and beautiful spirits (angels and archangels). The second of these eternally existing principles was called Ahriman. He was also a pure and beautiful spirit, but he later rebelled against Ormuzd, being jealous of his power. This did not occur, however, until after Ormuzd had created light, for previously Ahriman had not been conscious of the existence of Ormuzd. Because of his jealousy and rebellion, Ahriman became the Spirit of Evil. From himself he individualized a host of destructive creatures to injure Ormuzd.

(8) And (when the great struggle shall have been fought out which began when the Daêvas first seized the Demon of Wrath as their ally ), and when the (just) vengeance shall have come upon these wretches, then, O Mazda! the Kingdom shall have been gained for Thee by (Thy) Good Mind (within Thy folk). For to those, O living Lord! does (that Good Mind ) utter his command, who will deliver the Demon of the Lie into the two hands of the Righteous Order (as a captive to a destroyer).