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Isaiah, one of the greatest of the prophets, appeared at a critical moment in Israel’s history. The Northern Kingdom collapsed, under the hammerlike blows of Assyria, in 722/721 B.C., and in 701 Jerusalem itself saw the army of Sennacherib drawn up before its walls. In the year that Uzziah, king of Judah, died (742), Isaiah received his call to the prophetic office in the Temple of Jerusalem. Close attention should be given to chap. 6, where this divine summons to be the ambassador of the Most High is circumstantially described.
The vision of the Lord enthroned in glory stamps an indelible character on Isaiah’s ministry and provides a key to the understanding of his message. The majesty, holiness and glory of the Lord took possession of his spirit and, at the same time, he gained a new awareness of human pettiness and sinfulness. The enormous abyss between God’s sovereign holiness and human sinfulness overwhelmed the prophet. Only the purifying coal of the seraphim could cleanse his lips and prepare him for acceptance of the call: “Here I am, send me!”
The ministry of Isaiah extended from the death of Uzziah in 742 B.C. to Sennacherib’s siege of Jerusalem in 701 B.C., and it may have continued even longer, until after the death of Hezekiah in 687 B.C. Later legend (the Martyrdom and Ascension of Isaiah) claims that Hezekiah’s son, Manasseh, executed Isaiah by having him sawed in two; cf. Heb 11:37. During this long ministry, the prophet returned again and again to the same themes, and there are indications that he may have sometimes re-edited his older prophecies to fit new occasions. There is no evidence that the present arrangement of the oracles in the book reflects a chronological order. Indeed, it appears that there were originally separate smaller collections of oracles (note especially chaps. 6–12), each with its own logic for ordering, that were preserved fairly intact as blocks when the material was finally put together as a single literary work.
Isaiah’s oracles cluster around several key historical events of the late eighth century: the Syro-Ephraimite War (735–732 B.C.), the accession of Hezekiah (715 B.C.), the revolt of Ashdod (714–711 B.C.), the death of Sargon (705 B.C.), and the revolt against Sennacherib (705–701 B.C.). In 738 B.C., with the Assyrian defeat of Calno/Calneh (Is 10:9; Am 6:2), the anti-Assyrian league, of which Judah may have been the ringleader, collapsed, and both Israel and the Arameans of Damascus paid tribute to Assyria. By 735 B.C., however, Rezin of Damascus had created a new anti-Assyrian league, and when Ahaz refused to join, the league attempted to remove Ahaz from the throne of Judah. The resulting Syro-Ephraimite War was the original occasion for many of Isaiah’s oracles (cf. chaps. 7–8), in which he tried to reassure Ahaz of God’s protection and dissuade him from seeking protection by an alliance with Assyria. Ahaz refused Isaiah’s message, however.
When Hezekiah came to the throne in 715 B.C., Isaiah appears to have put great hopes in this new scion of David, and he undoubtedly supported the religious reform that Hezekiah undertook. But the old intrigues began again, and the king was sorely tempted to join with neighboring states in an alliance sponsored by Egypt against Assyria. Isaiah succeeded in keeping Hezekiah out of Ashdod’s abortive revolt against Assyria, but when Sargon died in 705 B.C., with both Egypt and Babylon encouraging revolt, Hezekiah was won over to the pro-Egyptian party. Isaiah denounced this “covenant with death” (28:15, 18), and again summoned Judah to faith in the Lord as the only hope. But it was too late; the revolt had already begun. Assyria acted quickly and its army, after ravaging Judah, laid siege to Jerusalem (701). “I shut up Hezekiah like a bird in his cage,” boasts the famous inscription of Sennacherib. The city was spared but at the cost of paying a huge indemnity to Assyria. Isaiah may have lived and prophesied for another dozen years after 701. There is material in the book that may plausibly be associated with Sennacherib’s campaign against Babylon and its Arabian allies in 694–689 B.C.
For Isaiah, the vision of God’s majesty was so overwhelming that military and political power faded into insignificance. He constantly called his people back to a reliance on God’s promises and away from vain attempts to find security in human plans and intrigues. This vision also led him to insist on the ethical behavior that was required of human beings who wished to live in the presence of such a holy God. Isaiah couched this message in oracles of singular poetic beauty and power, oracles in which surprising shifts in syntax, audacious puns, and double- or triple-entendre are a constant feature.
The complete Book of Isaiah is an anthology of poems composed chiefly by the great prophet, but also by disciples, some of whom came many years after Isaiah. In 1–39 most of the oracles come from Isaiah and reflect the situation in eighth-century Judah. Sections such as the Apocalypse of Isaiah (24–27), the oracles against Babylon (13–14), and probably the poems of 34–35 were written by followers deeply influenced by the prophet, in some cases reusing earlier Isaianic material; cf., e.g., 27:2–8 with 5:1–7.
Chapters 40–55 (Second Isaiah, or Deutero-Isaiah) are generally attributed to an anonymous poet who prophesied toward the end of the Babylonian exile. From this section come the great oracles known as the Servant Songs, which are reflected in the New Testament understanding of the passion and glorification of Christ. Chapters 56–66 (Third Isaiah, or Trito-Isaiah) contain oracles from the postexilic period and were composed by writers imbued with the spirit of Isaiah who continued his work.
The principal divisions of the Book of Isaiah are the following:
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