The first of the Major Prophets in the canon, the book of Isaiah is one of the longest books in the Bible. This, coupled with the NT’s frequent use of Isaiah, has contributed to the book’s great importance in Christian tradition. Isaiah contains some of the most memorable passages in Scripture, with its majestic poetry and evocative sermons making it a literary masterpiece.

The authorship of Isaiah has been one of the most debated issues in biblical interpretation. Ancient tradition credited the eighth-century BC prophet Isaiah with the entire sixty-six chapters. However, an early Jewish tradition in the Talmud claims that “the men of Hezekiah” compiled Isaiah, showing their awareness that the book did not come entirely from Isaiah. Most scholars today, including many evangelical scholars, conclude that the book of Isaiah is the end result of a history of composition that began in the eighth century BC (so-called First Isaiah [1 39]), continued in the sixth century BC during the exile (Second Isaiah, chaps. 40–55), and then was completed after the exile (Third Isaiah, chaps. 56–66).

Isaiah has a literary structure similar to that of Ezekiel, Zephaniah, Joel, and the Greek translation of Jeremiah. The first section is concerned with judgment on Israel (chaps. 1–12), the second with judgment on foreign nations (chaps. 13–23), and the third records prophecies of hope and salvation (chaps. 24–27). This structure purposefully places hopeful oracles of comfort after the judgment oracles. Some view the entire book of Isaiah as following this pattern (chaps. 1–12, judgment on Israel; chaps. 13–35, judgment on other nations; chaps. 40–66, oracles of comfort). However, both of these schemes are somewhat forced, since each section is slightly mixed (there are oracles of salvation in chaps. 1–12, prophecies against Judah in chaps. 13–23, and judgment oracles in chaps. 56–66). However, in broad outline it is helpful to recognize this structure.

Isaiah 1–39

Structure and themes. The structure of chapters 1–39 is quite complex. However, the prophecies and historical narratives concerned with Isaiah’s day are roughly in chronological order (e.g., prophecies and events occurring during the reign of King Ahaz [6:1–8:22] precede those during Hezekiah’s reign [36:1–39:8]). The structure of these chapters alternates between threat and promise (e.g., chap. 1 = threat; 2:1–4 = promise of hope; 2:5–4:1 = threat; 4:2–6 = promise of hope). Analogously, the main themes of these chapters alternate between threat and promise.

Holiness. A major theme of Isaiah is God’s holiness, as evidenced in its favorite title for the Lord, “Holy One of Israel.” While the original idea underlying holiness was physical separation and did not have an ethical dimension (e.g., temple prostitutes in the ancient Near East were called “holy women”), a different concept of holiness emerges in chapter 6, the account of Isaiah’s call. Since 6:1–9:7 is the only part in the book with autobiographical narration, these chapters probably come from an original memoir of Isaiah himself. The memoir is surrounded by judgment oracles with a repeated element, “Yet for all this, his anger is not turned away, his hand is still upraised” (5:25; 9:12, 17, 21; 10:4), suggesting that the memoir as a whole was inserted between these oracles to explain God’s anger recorded in 1–12. God’s mandate to Israel was to “be holy, because I am holy” (Lev. 11:44–45), but Israel failed to follow this command. In the presence of the holy God, Isaiah realized his own sinfulness and the sinfulness of his people (6:5), connecting the concepts of holiness and righteousness.

The remnant. Already in the first chapter we see the emergence of two groups within Israel: the wicked, who will be punished, and a remnant, who will be redeemed (1:27–31). This focus on the remnant was one way in which Isaiah saw hope for Israel despite the coming judgment that he predicted. The remnant theme highlights the apparent tension between God as holy and God as redeemer: God’s holiness is upheld through the judgment on Israel, but God’s character as savior is witnessed through the remnant that is redeemed.

A coming messianic king. The section 6:1–9:7 dates from the time of the Syro-Ephraimite war, and it appears that Isaiah wrote it down (8:16) when Ahaz refused his counsel. The memoir emphasizes the rejection of the Davidic king Ahaz and predicts the birth of a royal son who would replace Ahaz and bring freedom from oppression (9:1–7). This dissatisfaction with the reigning Davidic king was the seedbed for messianic expectations and is the background for the messianic trilogy of 7:14–16; 9:2–7; 11:1–9. While some of these passages may have originally referred to Hezekiah, he falls short of these messianic expectations, leaving the community of faith awaiting another anointed one (messiah). Ominously, chapter 39 describes Hezekiah’s entertaining guests from Babylon, perhaps implying an alliance between the two nations. Hezekiah’s actions prompt Isaiah to predict the Babylonian exile (39:6–7), providing a fitting segue to chapters 40–66.

Isaiah 40–55

A message to the exiles. Second Isaiah was written near the end of the exilic period for those who were deported by Nebuchadnezzar to Babylon. Although the exiles in Babylon were settled in communities (Ezek. 3:15) and allowed to build houses and farm the land (Jer. 29:5–7), they had no temple for worship, and many of the exiles probably saw the destruction of Jerusalem and their temple as the end of God’s action on their behalf. The gods of Babylon appeared to have won the victory. The exiles’ faith was flagging, and even those who did not abandon worship of Israel’s God simply clung to the past and expected nothing new from him.

Contrary to these expectations, Second Isaiah proclaims that God is doing something new for his people and bringing an end to the exile (40:1; 55:12). The role of Cyrus in this deliverance is highlighted, with explicit and implicit reference made to the Persian king (41:2–3, 25; 44:28; 45:1–4, 13–14). However, amid the oracles of comfort there is also a challenge to Israel, which is somehow resistant to the message. To break down this resistance, the prophecy has a sustained rhetoric against idol worship, with some quite hilarious sections ridiculing idol makers (44:9–20). Israel needed to realize that only Yahweh is God and to trust that he will redeem Israel for his purposes. Chapters 1–39 allude to the redemption of Israel (1:27; 35:9), and chapters 40–66 reveal more of how this redemption will take place: the work of “the servant.”

The servant. Several poems featuring an anonymous “servant” (42:1–9; 49:1–12; 50:4–11; 52:13–53:12) are often referred to as the Servant Songs. As far back as the Ethiopian eunuch (Acts 8:34), interpreters have struggled with how to identify “the servant.” At times, Israel is explicitly identified as the servant (Isa. 41:8–9; 42:19 [2×]; 43:10), yet the servant clearly also has individual features, suggesting that a person was to fill the role. Some have suggested Cyrus because 42:1 says that the servant “will bring justice to the nations,” and Cyrus is described as conquering nations (41:2, 25; 45:1). However, despite all the talk of Cyrus, the text never explicitly applies the term “servant” to him, which can hardly be by chance. Alternatively, the servant could be the prophet who speaks in these chapters (as the Ethiopian eunuch speculated), since he was destined for his mission before his birth (49:1) and equipped for a mission involving prophetic speech (49:2) and had received divinely revealed knowledge (50:4).

Yet the Servant Songs are also messianic and look forward to a future anointed one who will fulfill the role of the servant fully. In the NT, Jesus is presented as the new Israel (cf. Matt. 2:15 with Hos. 11:1) who truly fulfills the role of the servant (John 12:38, quoting Isa. 53:1; Matt. 8:17, quoting Isa. 53:4). However, Paul appears to hold to a collective interpretation of the songs, as he sees himself as the servant in some instances (Acts 13:47; Rom. 15:21; Gal. 1:15). Both the individual and the collective interpretations are legitimated in the NT, as both Jesus (individual) and the church (collective), which is Christ’s body, fulfill the role of the servant.

Isaiah 56–66

In 539 BC Cyrus allowed the exiles to return home to rebuild Jerusalem and its temple (Ezra 1:1–4). Despite many obstacles, the temple was finished in 515 BC. Even with this success, living in the land was challenging (see Malachi), with factions among the people, economic troubles, hypocritical worship (Isa. 58:1–14), and problems with corrupt leaders (56:9–57:13). It was for this postexilic community that Third Isaiah was written (probably before the reforms of Ezra and Nehemiah in 445 BC brought lasting change to the desperate situation).

Unlike in chapters 40–55, where Israel needs to be roused from its despair by the imminent actions of God, in chapters 56–66 the people are pleading with God to help them (59:11; 62:7). In chapter 59 the prophet declares that God’s delay in helping his people is due not to his inability but rather to the sins of the people, which are described, confessed, and lamented.

In many ways, Third Isaiah unites the themes of First Isaiah and Second Isaiah. Second Isaiah emphasizes the inbreaking of a new age that contrasts with the old. The former things are remembered, but the new thing that God was doing—the return from exile—is stressed. However, in Third Isaiah the deliverance from Babylon is seen as merely a foretaste of God’s promise, which is now identified as a new heaven and earth (chaps. 65–66). Third Isaiah looks forward to the new things that are still ahead.

First Isaiah predicts a Davidic messiah who would rule in righteousness (9:1–7; 11:1–9) and a faithful remnant that would respond in trust (10:20; 28:16). Second Isaiah does not continue with these themes, instead turning attention to the “servant” whose suffering and death would atone for Israel (53:4–5). However, Third Isaiah links First Isaiah’s faithful remnant with obedient “servants” who take on the mission of the Suffering Servant in Second Isaiah. This interpretation sets the direction for the NT’s identification of the royal messiah of chapters 1–39 as the servant of chapters 40–55 (Luke 24:26; Acts 8:32). Third Isaiah thus unites and reinterprets the book as a whole.

It is fitting that Jesus read the opening verses of Isa. 61 in the synagogue at the beginning of his ministry. Like Third Isaiah, he united prophecies of both the messianic Davidic ruler of First Isaiah and the Suffering Servant of Second Isaiah, taking on both roles himself. Third Isaiah ends with a glorious future pictured for the Jewish community as they function as priests in the world (61:6). Similarly, Christ’s body, the church, now functions in these same roles in the world (cf. Acts 13:47; Rev. 5:10).