There are those who believe the ancient Zoroastrian teaching of dualism, saying that good and evil, God and the Devil, must always have existed side by side.
परन्तु जैसे उपर बताया गया है, कुछेक अभी भी वास्तविक इब्लीस में विश्‍वास, को स्वीकार करते हैं ।