Who, when, where
Isaiah son of Amoz prophesied in Jerusalem during the reigns of Uzziah, Jotham, Ahaz, and Hezekiah, roughly 740 to 700 BC. He was a court-adjacent figure with direct access to kings, married to a woman the book calls 'the prophetess,' and the father of two sons whose names are themselves oracles (Shear-jashub and Maher-shalal-hash-baz). The setting is the Southern Kingdom of Judah under the shadow of two empires: Assyria, which destroys the Northern Kingdom in 722 BC and besieges Jerusalem in 701, and Babylon, which the book sees coming long before it arrives. The book's later chapters address an audience already in Babylonian exile, then a community back in the land trying to rebuild, which is the engine of the authorship debate below.
Where in history
Divided Kingdom → Assyrian Crisis → Exile horizon
Holiness meets the failure of God's people
- 740 BC
Isaiah's call in the year King Uzziah died (Isaiah 6)
The throne vision. Seraphim cry 'Holy, holy, holy.' Isaiah's lips are touched with a coal and he is sent. The ministry begins at the death of the long-reigning Judean king who has just contracted leprosy for entering the temple.
- 701 BC
Sennacherib's siege of Jerusalem fails (Isaiah 36-37)
The book's narrative core. Hezekiah spreads the Assyrian letter before the LORD; Isaiah delivers the oracle; the angel of the LORD strikes 185,000 Assyrians in one night. Jerusalem stands.
- 695 BC
Isaiah's ministry winds down under early Manasseh
Hezekiah's reign ends a few years later. Tradition (preserved in the Ascension of Isaiah) says Manasseh had Isaiah sawn in two, a tradition Hebrews 11:37 may allude to.
The amber span: Isaiah under Uzziah, Jotham, Ahaz, and Hezekiah.
The big idea
Isaiah is a book about the holiness of God meeting the failure of his people, and what he does about it. Chapters 1-39 indict Judah and the surrounding nations, walk through the Assyrian crisis under Hezekiah, and keep pointing forward to a coming king from David's line. Chapters 40-55 turn the camera to exile and announce comfort: a highway through the desert, a Suffering Servant who bears the sins of many, and Cyrus the Persian named as the LORD's anointed shepherd. Chapters 56-66 picture the restored Jerusalem, the gathering of the nations, and a new heavens and a new earth. The throne vision in chapter 6 sets the key (holy, holy, holy); the four Servant Songs are the book's spine; the new creation in 65-66 is its horizon.
Why this book still matters
Isaiah is the most quoted prophet in the New Testament. Matthew opens with Isaiah 7:14 (a virgin shall conceive) and runs Isaiah's Servant imagery through Jesus's ministry. John the Baptist quotes Isaiah 40 to identify himself as the voice in the wilderness. Jesus stands up in the Nazareth synagogue and reads Isaiah 61 over himself. Philip explains Isaiah 53 to the Ethiopian eunuch as the gospel of Jesus. Paul quotes Isaiah on the remnant, on the nations coming in, on every knee bowing. The Apocalypse closes with Isaiah's new heavens and new earth. If you remove Isaiah from the New Testament, the early church loses one of its two main interpretive frames for who Jesus is and what his death accomplishes (the other is the Psalms).
Isaiah 53:4-6
“Surely he hath borne our griefs, and carried our sorrows: yet we did esteem him stricken, smitten of God, and afflicted. But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed. All we like sheep have gone astray; we have turned every one to his own way; and the LORD hath laid on him the iniquity of us all.”
Acts 8:32-35
The Ethiopian eunuch is reading this passage in his chariot. Philip runs up and asks if he understands it. 'How can I, except some man should guide me?' The eunuch asks whether the prophet is speaking of himself or someone else. 'Then Philip opened his mouth, and began at the same scripture, and preached unto him Jesus.' The earliest gentile baptism in Acts is grounded in Isaiah 53.
Honest about what's debated
Three honest questions readers still ask. First, was Isaiah written by one person or several? The traditional view: Isaiah of Jerusalem wrote the whole book in the 8th century BC, including the chapters that name Cyrus by name 150 years in advance. The modern critical consensus: chapters 1-39 come from 8th-century Isaiah; chapters 40-55 ('Second Isaiah') were written near the end of the exile around 540 BC by someone in his tradition; chapters 56-66 ('Third Isaiah') were written after the return. The case for multiple authors rests on style, vocabulary, and historical horizon (chapters 40-55 already assume the exile as the audience's situation, not as a future warning). The case for single authorship rests on the book's literary unity and Jewish-Christian tradition. Second, who is the Suffering Servant of Isaiah 53? Israel collectively (the most common Jewish reading), a faithful remnant within Israel, an individual prophet, or the Messiah (the New Testament reading). Third, 7:14 'a virgin shall conceive': the Hebrew almah means a young woman of marriageable age, not specifically a virgin. The Greek Septuagint translates it with a stronger word meaning specifically 'virgin,' which is the version Matthew quotes. Most scholars see a near-term sign for Ahaz with a long-term fulfillment in Christ.
Isaiah is sixty-six chapters. Reading by section (1-12, 13-23, 24-27, 28-39, 40-55, 56-66) makes the book much more navigable than chapter by chapter. Chapter 6, chapter 40, and chapter 53 are the three entry points worth memorizing.