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Chapters 5–12 explain the significance of the Assyrian judgment against Israel: righteous rule by the Davidic king will follow after the arrogant Assyrian monarch is brought down. On that day all the nations of the world will come to Zion (Jerusalem) for instruction, but first the city must be punished and cleansed of evil.
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God has a plan which will be realised on the " Day of Yahweh", when Jerusalem will become the centre of his worldwide rule.
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General scholarly consensus through most of the 20th century saw three separate collections of oracles in the book of Isaiah. The Isaiah scroll, the oldest surviving manuscript of Isaiah: found among the Dead Sea Scrolls and dating from about 150 to 100 BCE, it contains almost the whole Book of Isaiah and is substantially identical with the modern Masoretic text.
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In Christian circles, it was held in such high regard as to be called "the Fifth Gospel", and its influence extends beyond Christianity to English literature and to Western culture in general, from the libretto of Handel's Messiah to a host of such everyday phrases as " swords into ploughshares" and " voice in the wilderness". Isaiah was one of the most popular works among Jews in the Second Temple period (c. Isaiah speaks out against corrupt leaders and for the disadvantaged, and roots righteousness in God's holiness rather than in Israel's covenant. The Deutero-Isaian part of the book describes how God will make Jerusalem the centre of his worldwide rule through a royal saviour (a messiah) who will destroy the oppressor ( Babylon) this messiah is the Persian king Cyrus the Great, who is merely the agent who brings about Yahweh's kingship. The book can be read as an extended meditation on the destiny of Jerusalem into and after the Exile. While virtually no scholars today attribute the entire book, or even most of it, to one person, the book's essential unity has become a focus in more recent research. Isaiah 1– 33 promises judgment and restoration for Judah, Jerusalem and the nations, and chapters 34–66 presume that judgment has been pronounced and restoration follows soon. Johann Christoph Döderlein suggested in 1775 that the book contained the works of two prophets separated by more than a century, and Bernhard Duhm originated the view, held as a consensus through most of the 20th century, that the book comprises three separate collections of oracles: Proto-Isaiah ( chapters 1– 39), containing the words of the 8th-century BCE prophet Isaiah Deutero-Isaiah ( chapters 40– 55), the work of an anonymous 6th-century BCE author writing during the Exile and Trito-Isaiah ( chapters 56– 66), composed after the return from Exile. It is identified by a superscription as the words of the 8th-century BCE prophet Isaiah ben Amoz, but there is extensive evidence that much of it was composed during the Babylonian captivity and later. The Book of Isaiah ( Hebrew: ספר ישעיהו, ) is the first of the Latter Prophets in the Hebrew Bible and the first of the Major Prophets in the Christian Old Testament.
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