The first cosmic dualism of good and evil was in ancient Persia. Ahura Mazda is the good or light side, while the negative side is Angra Mainyu. It is well known that the Jews got their concept of Evil from Zoroastrianism. They named their Adversary Satan, but even the Persians, where they got the concept not the name, called their adversary Angra Mainyu. The point is, the Jews got their evil destructive principle from the Persians and called it Satan, which not even the ancient Persians did. They superimposed the idea or principle of Angra Mainyu over the Being Satan.