[112] The Tribes and Castes of Bengal. H. H. Risley (1892), vol. i, lxv, _et seq_.
Indian Asuras as Demons—Persian Ahura a God—Indian Gods as Persian Demons—Theory of Assyrian Influence—Indra's Battle with Asuras—Like Thor's Conflict with Giants—The Sun and Moon Devourer—Giants and Demons of Ocean—The Flying City—Destruction of World by Fire—Teutonic Parallel—Serpent Demigods—Man's Special Enemies—The Corpse Eaters—Demons of Disease, Unbelief, and Robbery—Elves and Fairies—The “Good People”—Celestial Musicians and Dancing Girls—Origin of Mythical Beings—Story of a Love-sick King—His Fairy Bride—The Echoing Forest Nymph—The “Language of Birds”—Birds as Spirits and Ghosts.
The gods are the Suras and the demons the Asuras or “non-gods”. This distinction, however, did not obtain in the early Vedic period. Originally the deities, and especially Varuna and Mitra, were called Asuras, but in the later part of the _Rigveda_ the term is applied chiefly to the enemies of the gods. In the _Atharvaveda_, as in subsequent Epic literature, the Asuras are simply demons and giants and goblins.
No conclusive explanation can be offered as to how this remarkable change took place in the course of the centuries embraced by the Vedic period. It may have been due primarily to sectarian strife between the religious teachers of those tribes which had been influenced by Babylonian modes of thought and those which clung tenaciously to the forms of primitive Aryan nature worship, and perhaps also the worship of ancestors (Pitris). In the old Persian language, which, like Greek, places “h” before a vowel where “s” is used in Sanskrit, Ahura ( = Asura) signifies “god”. The Zoroastrian chief god is called Ahura-Mazda, “the wise Lord”, as Varuna is addressed in early Rigvedic hymns, “wise Asura and King”, and “the all-knowing Asura who established the heavens and fixed the limits of the earth”. On the other hand “daeva” in the Iranian dialect, which is cognate with Sanskrit “deva”, “god”, came to mean “demon”. “Asura” is derived from the root “asu”, which signifies “the air of life”, and “deva” from “div”, “to shine”, or “deiwo”, “heavenly”.
The view has been urged that the revolt against “Asura” in India was due to the hatred cherished towards the Persians who had become subject to the Assyrians, the worshippers of Ashur. It was originally based on the assumption that Assyrian aggression caused the migration of Aryan tribes towards India. Subsequent research, however, has tended to dispel this theory. It has been found, for instance, that Aryans were associated with the Kassites who overthrew the Hammurabi dynasty of Babylon prior to the invasion of the Punjab, and that the Assyrians were for a period vassals of the Mitanni kings, who had Aryan names and worshipped Indra, Varuna, and Mithra in Mesopotamia and Asia Minor. The weak point in the Ashur-Asura theory is that it throws no light on the process which caused the Persian “daeva” to be applied to demons instead of to gods. How the gods of the Indian Aryans became the demons of Persia and the demons of Persia became the gods of India is a problem for which a solution has yet to be found.