At his appearing all nature rejoices (Yasht, 13, 93); he enters into conflict with the demons and rids the earth of their presence (Yasht, 17,19); Satan approaches him as tempter to make him renounce his faith (Vendidad, 19, 6).
The Vendidad also merely gives accounts of the dialogues between Ormazd and Zoroaster.
On the basis of the new teaching arose a widely spread priesthood (athravano) who systematized its doctrines, organized and carried on its worship, and laid down the minutely elaborated laws for the purifying and keeping clean of soul and body, which are met with in the Vendidad.
Under the name of Mouru this place is mentioned with Bakhdi (Balkh) in the geography of the Zend-Avesta (Vendidad, ed Spiegel, 1852-1863), which dates probably from at least 1200 B.C. Under the name of Margu it occurs in the cuneiform (Behistun) inscriptions of the Persian monarch Darius Hystaspis, where it is referred to as forming part of one of the satrapies of the ancient Persian Empire.
He had lighted on some fragments of the Vendidad Sade, and formed the project of a voyage to India to discover the works of Zoroaster.