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Did the Prophet Isaiah Write the Book of Isaiah?
Why I believe Isaiah wrote the prophecies bearing his name—including his remarkable prediction about Cyrus.
What if a prophet named a king roughly 150 years before that king conquered Babylon? Would you recognize it as an extraordinary prophecy—or take it as evidence that someone else wrote those words later?
That’s one of the central questions behind the debate over who wrote Isaiah.
I recently received a question from a listener whose pastor said Isaiah didn’t actually write the book bearing his name. When asked about it, the pastor explained that this was an accepted fact among scholars.
I’ll be up front with you: I believe Isaiah’s prophecies come from Isaiah, including the passages about Cyrus. But there are serious arguments on both sides, and we should understand them rather than present a debated conclusion as a settled fact.
Why do some scholars question Isaiah’s authorship?
Isaiah ministered in Judah during the eighth century BC, when Assyria was the great threat. Jerusalem’s destruction by Babylon came later, in 586 BC. Cyrus, the Persian king, conquered Babylon in 539 BC, opening the way for Jewish exiles to return home.
Yet Isaiah 44:28 names Cyrus and connects him with the rebuilding of Jerusalem and the temple. If Isaiah delivered that prophecy around 700 BC, he named Cyrus about 160 years before Babylon fell.
Many scholars place these chapters closer to Cyrus’s lifetime. Their argument involves more than his name. Beginning in chapter 40, the book often sounds as though it’s speaking to people already experiencing exile. Scholars also point to changes in language, tone, and emphasis.
That’s why you’ll sometimes hear about “First Isaiah,” “Second Isaiah,” and “Third Isaiah,” usually referring to chapters 1–39, 40–55, and 56–66. These are scholarly labels for proposed stages in the book’s development.
We should be fair here: not everyone who accepts later authorship rejects prophecy. Some believe a prophet living during Cyrus’s rise predicted what he would do.
Still, these arguments don’t require us to conclude that another prophet supplied the later chapters. Here are four reasons I find Isaiah’s authorship convincing.
1. Judgment and restoration belong together
In Isaiah 39, Isaiah tells Hezekiah that his treasures will be carried to Babylon and that some of his descendants will serve in the Babylonian king’s palace. Chapter 40 then begins the great message of comfort.
That progression makes sense. Isaiah announces the coming judgment, then looks beyond it to God’s restoration of his people.
Why would God give words of comfort before the catastrophe happened? Because his people would need those words when it did. A prophecy could warn Isaiah’s generation and sustain their descendants.
There are also connections throughout the book. The description of God as “the Holy One of Israel” appears in both earlier and later chapters. Holiness, pride, idolatry, judgment, and redemption run through the whole book.
Those connections don’t prove a single author. An editor could have brought related material together. But changes in tone don’t prove multiple authors either. A prophet warning of judgment will naturally sound different when announcing restoration.
2. Isaiah had an extensive ministry and was a writer
Isaiah 1:1 places his ministry during the reigns of Uzziah, Jotham, Ahaz, and Hezekiah. And 2 Chronicles 26:22 identifies Isaiah as the writer of an account of Uzziah’s reign.
That doesn’t settle who wrote every chapter of Isaiah. It does remind us that we’re dealing with a writer whose ministry extended across different kings and circumstances.
Should we be surprised if his messages varied in emphasis? I can’t expect everything I write today to sound exactly like what I wrote twenty years ago. Differences deserve attention, but they aren’t enough by themselves to establish a different author.
3. John attributes passages from both sections to Isaiah
In John 12:37–41, John quotes Isaiah 53:1 and then Isaiah 6:10. Those passages fall on opposite sides of the proposed division between “First” and “Second” Isaiah.
Yet John attributes both to Isaiah.
Some scholars respond that John is using the familiar name of the book rather than explaining how it was composed. And John’s purpose certainly isn’t to give us a lecture on authorship.
Nevertheless, I think the natural reading supports the traditional understanding. John presents both passages as Isaiah’s testimony, and that matters to me.
4. The Cyrus prophecy fits what God claims about himself
In Isaiah 46:9–11, God distinguishes himself from idols by his ability to announce what is coming and accomplish his purposes.
The naming of Cyrus fits that argument. God identifies the ruler he will use to bring his people home—even though Cyrus himself doesn’t know the Lord (Isaiah 45:4–5).
Now, saying God could reveal Cyrus’s name doesn’t prove Isaiah wrote the passage. But we shouldn’t dismiss Isaiah’s authorship simply because the prediction is remarkable. We need to allow Scripture to speak on its own terms, including its claim that God knows and reveals the future.
So, did Isaiah write Isaiah?
I believe he did, including the prophecies concerning Cyrus. That doesn’t mean Isaiah personally put every word into its final arrangement. His messages could have been recorded, collected, and arranged by scribes or disciples.
But I don’t find the arguments for assigning the later prophecies to someone else compelling enough to overturn the traditional understanding.
And the encouragement here goes beyond an authorship debate. God’s people would lose their city, their temple, and their freedom. Yet the God who announced their judgment also promised their restoration. Even a Persian king who didn’t know him would become an instrument of his mercy.
God knew what was coming, and he had already provided for his people’s future. Their exile would be real, but it would not have the final word.
Did the Prophet Isaiah Write the Book of Isaiah?
Blake Barbera is the founder and Lead Teaching Minister at That You May Know Him. He has been teaching the Bible for more than two decades, and has served the Church in various capacities during that time, including as a missionary and pastor.
For more about our ministry, visit our About Page: https://www.thatyoumayknowhim.com/about
