Book of Isaiah

The Book of Isaiah opens the section of the Latter Prophets in the Hebrew Bible and is also the first of the major prophetic books in the Christian Old Testament. Its superscription attributes it to the 8th-century BCE prophet Isaiah, but scholars have found that large portions were actually written during the Babylonian exile and afterward. In 1775, Johann Christoph Döderlein proposed that the book combined the work of two prophets separated by over a century. Later, Bernhard Duhm developed the influential view—widely accepted through most of the 1900s—that the book consists of three separate collections: Proto-Isaiah (chapters 1–39), from the 8th-century prophet; Deutero-Isaiah or the "Book of Consolation" (chapters 40–55), by an anonymous 6th-century author during the Exile; and Trito-Isaiah (chapters 56–66), written after the return from exile. Chapters 1–33 promise both judgment and restoration for Judah, Jerusalem, and other nations, while chapters 34–66 assume judgment has already occurred and restoration is imminent. Although few scholars today credit the entire book to a single person, recent research has focused more on its overall unity.

The book can be understood as an extended meditation on Jerusalem’s fate through the exile and beyond. The Deutero-Isaiah section describes how God will make Jerusalem the center of his worldwide rule through a royal savior, or messiah, who will crush the oppressor—identified as Babylon, the Neo-Babylonian Empire. That messiah is Cyrus the Great of Persia, founder of the Achaemenid Empire, who acts as God’s agent to establish Yahweh’s kingship. Christians later interpreted certain passages in Isaiah as messianic prophecies pointing to Jesus. Isaiah condemns corrupt leaders and advocates for the disadvantaged, grounding righteousness in God’s holiness rather than in Israel’s covenant. During the Second Temple period (roughly 515 BCE to 70 CE), Isaiah was one of the most popular works among Jews. In Christian tradition, it was so highly regarded that it was called the "Fifth Gospel," and its influence extends beyond religion into English literature and Western culture—from the libretto of Handel’s *Messiah* to everyday phrases like "swords into ploughshares," "shelter from the storm," and "voice in the wilderness."

**Structure** For most of the 20th century, the scholarly consensus divided Isaiah into three distinct collections based on possible authors: chapters 1–39 (Proto-Isaiah, from the original Isaiah), 40–55 (Deutero-Isaiah, an anonymous exilic writer), and 56–66 (Trito-Isaiah, an anthology of about twelve passages). While part of this consensus remains, the last quarter of the 20th century saw a radical challenge to this three-part view. The newer approach emphasizes literary and formal characteristics rather than authorship, identifying a two-part structure split between chapters 33 and 34: chapters 1–33 contain warnings of judgment and promises of restoration for Jerusalem, Judah, and the nations; chapters 34–66 assume judgment has already happened and restoration is near.

**Summary** Viewing Isaiah as a two-part book (chapters 1–33 and 34–66) with a unifying theme yields a summary like this: The book opens by introducing themes of judgment and subsequent restoration for the righteous. God has a plan to be realized on the "Day of Yahweh," when Jerusalem will become the center of his worldwide rule. On that day, the nations will come to Zion for instruction, but first the city must be punished and cleansed of evil. Israel is invited to join this plan. Chapters 5–12 explain the significance of the Assyrian judgment against Israel: after the arrogant Assyrian monarch is brought down, righteous rule by the Davidic king will follow. Chapters 13–27 announce that the nations are being prepared for Yahweh’s world rule; chapters 28–33 declare that a royal savior (the messiah) will appear after Jerusalem’s punishment and the destruction of her oppressor. The oppressor—now identified as Babylon rather than Assyria—is about to fall. Chapters 34–35 describe how Yahweh will return the redeemed exiles to Jerusalem. Chapters 36–39 present the faithfulness of King Hezekiah during the Assyrian siege as a model for the restored community. Chapters 40–54 state that Zion’s restoration is happening because Yahweh, the creator of the universe, has appointed the Persian king Cyrus the Great as the promised messiah and temple-builder. Specifically, chapter 53 predicts a suffering servant who will be the messiah the prophet spoke of earlier. Chapters 55–66 exhort Israel to keep the covenant. God’s eternal promise to David is now extended to the entire people of Israel and Judah. The book ends by urging righteousness as the final stages of God’s plan unfold, including the pilgrimage of the nations to Zion and the establishment of Yahweh’s kingship. The older, three-part view leads to a more atomized outline: Proto-Isaiah (chapters 1–39) includes oracles against Judah from Isaiah’s early years (1–12), oracles against foreign nations from his middle years (13–23), the later-added "Isaiah Apocalypse" (24–27), oracles from his later ministry (28–33), a vision of Zion possibly added later (34–35), and stories of Isaiah’s life from the Book of Kings (36–39). Deutero-Isaiah (chapters 40–55) contains two major sections.