If we take these things into the account, and assume it as proved that Zoroaster flourished under the Median dynasty, we cannot be surprised by the fact, that on the downfall of that monarchy its hereditary religion was adopted by the conquerors. Supposing (what we are not prepared either to assert or deny) that up to that period these doctrines were unknown to the Persians, yet from the nature of things, their reception was an almost necessary consequence of a fact which is indisputable, the adoption by the Persian monarchs of the court-ceremonial of the Medes. The latter had been defined and prescribed by the mixed political and religious code of that nation, and was inseparable from the authority on which it rested. The Magians and wise men formed the most dignified portion of the court; they surrounded the king’s person, and were indispensable to him as soothsayers and diviners. They were distinguished also by their dress; their girdle (
Costume of a Persian Priest
(After Du Sommerard)
It is certain from history that the Median priest-caste became established among the Persians as early as the foundation of their monarchy by Cyrus. Not only do Herodotus and Ctesias describe them as an order of priests under the first Persian princes, but the express testimony of Xenophon in the
Thus the first consequence of their appointment was the introduction of a certain religious ceremonial in the court of Persia. It by no means, however, follows from this that the Persians at once laid aside the manners and customs of their forefathers, and, as it were, suddenly became converted into Medes; but rather, that a mixture and union of their ancient and newly-adopted opinions and customs took place. The laws of the Persians, in consequence, came to be cited in connection with those of the Medes; their national deities were still reverenced as before; and in his time Herodotus remarks certain diversities observable in the ceremonies of the Persians as compared with those of the Magians. We must not therefore be surprised at not finding a complete correspondence between the precepts of the Zendavesta and the customs of the Persians; on the contrary, this very diversity is one mark of the genuineness of that composition.
Nor are we authorised to conclude from the expressions of Xenophon that the whole Persian nation at once adopted the Magian religion. This appears to be sufficiently contradicted by the totally different way of life of the various Persian tribes; besides, as we have already had occasion to remark, and shall presently see confirmed, by the Persians Xenophon means the nobler tribes, and possibly only that of the Pasargadæ. Far less are we entitled to suppose that the creed of Zoroaster was at once introduced in the conquered countries as the universal religion of the state; for although strongly marked by the character of intolerance, this religion appears never, like that of Mohammed, to have been propagated by fire and sword: its author was himself neither a conqueror nor a warrior, nor did the princes who embraced it esteem it a duty to provide for its dissemination by the power of the sword.