AHURA • FREE-TRANSLATOR.COM • Definition of Ahura

... Persia, M. Haug, the famous Zend scholar, asserts that "Monotheism was the leading idea of Zoroaster's theology;" he called God Ahura-mazda, i. e., "the Living Creator." Zoroaster did not teach a theological Dualism. He arrived "at the idea of the unity and indivisibility of the Supreme Being," and only as "in course of time this doctrine was changed and corrupted ... the dualism of God and the devil arose." "Monotheism ...

— Evolution - An Investigation and a Critique • Theodore Graebner