Zoroaster Rationality, Knowledge & Truth" views Zoroaster as Prophet of God and describes such the expressions to be a concept which is similar to the concepts in Judaism, Christianity and Islam. Manichaeism considered Zoroaster to be a figure (along with Jesus and the Buddha) in a line of prophets of which Mani (216–276) was the culmination. Zoroaster's ethical dualism is—to an extent—incorporated in Mani's doctrine, which viewed the world as being locked in an epic battle between opposing forces of good and evil. Manicheanism also incorporated other elements of Zoroastrian tradition, particularly the names of supernatural beings; however, many of these
Medes of the Indo-Iranian word "arta-" (lit. "truth") which is familiar from both Avestan and Old Persian and also examples of theophoric names containing "Maždakku" and also the name "Ahura Mazdā". Scholars disagree whether these are indications of Zoroastrian religion amongst the Medes. Diakonoff believes that "Astyages and perhaps even Cyaxares had already embraced a religion derived from the teachings of Zoroaster" which was not identical with doctrine of Zarathustra and Mary Boyce believes that "the existence of the Magi in Media with their own traditions and forms of worship was an obstacle to Zoroastrian proselytizing there". Boyce wrote that the