See also Mitra/Mithra
The sacred books of Mazdaism, especially the Avesta, breathe the spirit of a lofty monotheism, which in the course of its further development was supplemented by the belief in a divine mediator, Mithra, born of a virgin and destined to be the ruler of the kingdom of God on earth, for the coming of which all good worshippers of Ahura Mazda were praying. Mazdaism has on several occasions powerfully influenced the religious life of the Western world, first in the days of Cyrus, then in the time when the Apocrypha of the Old Testament were written, furthermore in the beginning of the Christian era when Mithraism became a rival of Christianity, and finally in its sectarian revival as Manicheism, after the suppression of which the very names of Ahura Mazda, of Zarathushtra, and of Mithra were forgotten.