Book of Isaiah

Isaiah is the longest of the Hebrew Bible's prophetic books and moves across a wider historical and emotional range than any other, opening with the 8th century prophet's scathing indictment of Judah's social injustice and empty ritual, "your hands are full of blood," and his famous call vision, seraphim crying "holy, holy, holy" as coals purify his lips for prophetic speech. The book's emotional register shifts sharply at chapter 40, opening instead with comfort rather than judgment, "comfort, comfort my people," addressed to an audience already living through the Babylonian exile the earlier chapters had only warned about, and introducing the Servant Songs, four passages describing a mysterious suffering servant of the Lord whose identity, Israel personified, a specific prophet, or a future messianic figure, has been read differently across Jewish and Christian tradition for two thousand years.

The book's final section turns toward cosmic renewal, envisioning new heavens and a new earth and a future where "the wolf shall live with the lamb," verses that have supplied some of the most quoted eschatological imagery in both Jewish and Christian hope for final restoration. Christian tradition has drawn on Isaiah more than any other Hebrew Bible book to interpret the life of Jesus, from the virgin conceiving a son named Immanuel in chapter 7 to the suffering servant "pierced for our transgressions" in chapter 53.

The question of how many authors wrote Isaiah is among the longest running and best evidenced debates in Hebrew Bible scholarship. The turn from judgment to comfort at chapter 40 coincides exactly with a change of historical horizon, the earlier chapters address the 8th century Assyrian threat, while chapters 40 onward speak as though the Babylonian exile is already underway and, strikingly, name the Persian king Cyrus by name as a living ruler about to free Israel, a specificity scholars find far easier to explain as a prophet speaking to his own contemporaries than as prediction more than a century in advance. This observation, developed across 18th and 19th century German biblical criticism and formalized by Bernhard Duhm's 1892 commentary into the now standard three part division, First, Deutero and Trito Isaiah, remains the dominant scholarly position, while a minority of scholars, more often working from within confessional Jewish or Christian commitments, continue to defend single authorship, arguing that Isaiah's prophetic gift could plausibly extend to naming a future deliverer and that the book's consistent vocabulary and imagery across all sixty six chapters argue for one hand rather than several. The Great Isaiah Scroll from Qumran settles one part of the question decisively: whatever the book's compositional history, it was already read and copied as a single unified work by at least the 2nd century BCE, centuries before any of these critical arguments were made.