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Why is only part of the Book of Isaiah attributed to the 8th-century prophet Isaiah?
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Isaiah
Miniature of Isaiah, manuscript illumination from The Siegburg Lectionary, 12th century.
The Book of Isaiah is not the work of a single author but a collection of writings that evolved over several centuries. While the first 39 chapters are associated with the 8th-century BCE prophet Isaiah of Jerusalem, the remaining chapters are attributed to later periods and different authors.12
- Chapters 1–39: These contain the prophecies and reports of the 8th-century prophet, though they also include later additions and editorial work by his disciples, reaching their final form perhaps as late as the 5th century BCE.12
- Chapters 40–55 (Deutero-Isaiah): These chapters date to the 6th-century BCE Babylonian Exile. They were written by an anonymous prophet who addressed the exiles with promises of deliverance and the eventual return to their homeland.12
- Chapters 56–66 (Trito-Isaiah): These were composed even later, following the return from exile, and reflect the specific cultic and social concerns of the restored community in Palestine.12
Scholars believe these sections were brought together by a "school" of Isaiah’s disciples who preserved and expanded his message to provide hope and instruction to subsequent generations.23