Zoroaster lower right corner. The prophet is holding a star-studded globe. Zoroaster Zoroaster (, ; "Zōroastrēs"), (Persian: زرتشت pronounced as Zartusht) also known as Zarathustra (, ; "Zaraθuštra"), Zarathushtra Spitama, or Ashu Zarathushtra, was an ancient Persian prophet, spiritual leader and ethical philosopher who taught a spiritual philosophy of self-realization and realization of the Divine. His teachings challenged the existing traditions of the Indo-Iranian religion and later developed into the religion of Mazdayasna or Zoroastrianism. He inaugurated a movement that eventually became the dominant religion in Ancient Persia. He was a native speaker of Old Avestan and lived in the eastern
Zoroaster and myths. Zoroaster's name in his native language, Avestan, was probably "Zaraϑuštra". His English name, "Zoroaster", derives from a later (5th century BCE) Greek transcription, "Zōroastrēs" (), as used in Xanthus's "Lydiaca" (Fragment 32) and in Plato's "First Alcibiades" (122a1). This form appears subsequently in the Latin "" and, in later Greek orthographies, as Ζωροάστρις "Zōroastris". The Greek form of the name appears to be based on a phonetic transliteration or semantic substitution of Avestan "zaraϑ-" with the Greek ζωρός "zōros" (literally "undiluted") and the Avestan "-uštra" with ἄστρον "astron" ("star"). In Avestan, "Zaraϑuštra" is generally accepted to derive from