Isaiah appears to have been familiar with the Tigro-Euphratean myths about the divinity of kings and the displacement of the elder god by the younger god, of whom the ruling monarch was an incarnation, and with the idea that the summit of the Celestial mountain was crowned by the "north star", the symbol of Anshar. "Thou shalt take up this parable", he exclaimed, making use of Babylonian symbolism, "against the king of Babylon and say, How hath the oppressor ceased! the golden city ceased!... How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations! For thou hast said in thine heart, I will ascend unto heaven, I will exalt my throne above the stars of God; I will sit also upon the mount of the congregation, _in the sides of the north_; I will ascend above the heights of the clouds; I will be like the most High."[361] The king is identified with Lucifer as the deity of fire and the morning star; he is the younger god who aspired to occupy the mountain throne of his father, the god Shar--the Polar or North Star. It is possible that the Babylonian idea of a Celestial mountain gave origin to the belief that the earth was a mountain surrounded by the outer ocean, beheld by Etana when he flew towards heaven on the eagle's back. In India this hill is Mount Meru, the "world spine", which "sustains the earth"; it is surmounted by Indra's Valhal, or "the great city of Brahma". In Teutonic mythology the heavens revolve round the Polar Star, which is called "Veraldar nagli",[362] the "world spike"; while the earth is sustained by the "world tree". The "ded" amulet of Egypt symbolized the backbone of Osiris as a world god: "ded" means "firm", "established";[363] while at burial ceremonies the coffin was set up on end, inside the tomb, "on a small sandhill intended to represent the Mountain of the West--the realm of the dead".[364] The Babylonian temple towers were apparently symbols of the "world hill". At Babylon, the Du-azaga, "holy mound", was Merodach's temple E-sagila, "the Temple of the High Head". E-kur, rendered "the house or temple of the Mountain", was the temple of Bel Enlil at Nippur. At Erech, the temple of the goddess Ishtar was E-anna, which connects her, as Nina or Ninni, with Anu, derived from "ana", "heaven". Ishtar was "Queen of heaven".