Babylonian religion was a mixture of Sumerian and Semitic elements. The primitive Sumerian had believed in a sort of animism. Each object had its _zi_ or "spirit," like men and beasts; the _zi_ gave it its personality, and endowed it, as it were, with vital force. The _zi_ corresponded with the _ka_ or "double" of the Egyptians, which accompanied like a shadow all things in heaven and earth. The gods themselves had each his _zi_; it was this alone that made them permanent and personal. With such a form of religion there could be neither deities nor priests in the usual sense of the words. The place of the priest was taken by the sorcerer, who knew the spells that could avert the malevolence of the "spirits" or bring down their blessings upon mankind. With the progress of civilisation, certain of the "spirits" emerged above the rest, and became veritable gods. The "spirit" of heaven became Ana of Erech, the Sky-god; the "spirit" of earth passed into El-lil of Nippur; and the "spirit" of the deep into Ea of Eridu. The change was hastened by contact with the Semite. The Semite brought with him a new religious conception. He believed in a god who revealed himself in the sun, and whom he addressed as Baal or "Lord." By the side of Baal stood his colourless reflection, the goddess Baalath, who owed her existence partly to the feminine gender possessed by the Semitic languages, partly to the analogy of the human family. But the Baalim were as multitudinous as their worshippers and the high-places whereon they were adored; there was little difficulty, therefore, in identifying the gods and "spirits" of Sumer with the local Baals of the Semitic creed. El-lil became Bel of Nippur, Asari or Merodach Bel of Babylon. But in taking a Semitic form, the Sumerian divinities did not lose their old attributes. Bel of Nippur remained the lord of the ghost-world, Bel-Merodach the god who "raises the dead to life" and "does good to man." Moreover, in one important point the Semite borrowed from the Sumerian. The goddess Istar retained her independent position among the crowd of colourless female deities. Originally the "spirit" of the evening-star, she had become a goddess, and in the Sumerian world the goddess was the equal of the god. It is a proof of the influence of the Sumerian element in the Babylonian population, that this conception of the goddess was never forgotten in Babylonia; it was only when Babylonian culture was handed on to the Semitic nations of the west that Istar became either the male Atthar of southern Arabia and Moab, or the emasculated Ashtoreth of Canaan.