Ahriman retained from first to last the same character and position, neither rising into an object of worship, nor sinking into a mere personification of evil.

The inquiries which Aristotle caused to be made, towards the very close of the Empire, into the true nature of the Persian Religion, showed him Ormazd and Ahriman still recognized as Principles, still standing in the same hostile and antithetical attitude, one towards the other, which they occupied when the first Fargard of the Vendidad was written, long anterior to the rise of the Persian Power..