Isaiah
Isaiah son of Amoz ministered in Jerusalem during a period of extraordinary geopolitical turbulence — the reigns of four kings of Judah: Uzziah, Jotham, Ahaz, and Hezekiah (~740–700 BC). His call came in the year of Uzziah's death (6:1), the most prosperous and powerful king Judah had seen in generations. His death was a national identity crisis: in whom could the nation now trust?
The geopolitical context was dominated by the irresistible advance of Assyria under Tiglath-Pileser III, Sargon II, and Sennacherib. The Northern Kingdom (Israel) was destroyed by Sargon II in 722 BC, its ten tribes deported and dissolved forever. Judah survived as an Assyrian vassal state, paying tribute under constant threat. In 701 BC, Sennacherib besieged Jerusalem with an army of 185,000 men — and was repelled miraculously (37:36).
Isaiah had direct access to the royal family — he confronted Ahaz personally when that king planned to ally with Assyria against the Syro-Ephraimite coalition (chs. 7–8). His central message was always the same: trust in God, not in human alliances. Judah was perpetually tempted to seek protection from Egypt or Assyria — and Isaiah denounced this as political idolatry.
The divine title most characteristic of Isaiah is Qedosh Yisra'el — the Holy One of Israel — which appears 25 times in the book (and only 6 times in the rest of the OT). This title is born from the inaugural vision (ch. 6): the seraphim cry "Holy, holy, holy is the Lord of hosts" — the only trisagion in the OT. Divine holiness is not merely moral purity but absolute otherness: God is other in a way that human beings cannot even articulate.
Isaiah's response to the vision is the biblical model of how God's holiness affects the human being: "Woe is me! For I am lost; for I am a man of unclean lips" (6:5). The encounter with the Holy One does not produce spiritual pride — it produces the disintegration of all self-confidence. Purification comes from outside (the burning coal from the altar — 6:6–7), not from within. Only then comes the call and the availability: "Here I am! Send me" (6:8).
The four Servant Songs (42:1–9; 49:1–13; 50:4–11; 52:13–53:12) constitute the theological apex of Isaiah and some of the most debated and profound texts in all of Scripture. The Servant is a figure that Israel identifies collectively (49:3: "Israel, you are my servant") but who also acts on behalf of Israel in ways no nation can fulfill.
The fourth song (Is 53) is the text most cited by NT authors in relation to the Passion of Christ — and the connection is explicit in Acts 8:30–35, where Philip explains to the Ethiopian eunuch that the text speaks of Jesus. The Servant is described as: without appealing form (53:2), despised and rejected (53:3), bearing others' sorrows (53:4), wounded for the transgressions of others (53:5), like a silent sheep before its shearer (53:7), killed and buried with the wicked (53:9), yet seeing offspring and prolonging his days (53:10). It is the most precise description of the Passion and Resurrection written six centuries before they occurred.
Isaiah is the prophet of the new creation. Chapters 65–66 describe a recreated world where "the new heavens and the new earth" make the past irrelevant (65:17). The wolf shall graze with the lamb, the lion shall eat straw, no creature shall hurt on the holy mountain (65:25). Children will not die young; builders will inhabit their own houses; planters will eat their own fruit (65:20–22).
The NT explicitly takes up this vision: Revelation 21:1 cites "new heavens and a new earth" from Is 65:17; Rev 21:4 ("death shall be no more") echoes Is 25:8. Paul in Romans 8:19–22 describes creation groaning as it awaits final redemption — language directly dependent on Isaiah. Isaiah's eschatology is not escape from the present world: it is its radical transformation by the same God who created it.
"But he was pierced for our transgressions; he was crushed for our iniquities; upon him was the chastisement that brought us peace, and with his wounds we are healed."
Isaiah 53:5 — ESVSince the 18th century, historical criticism has proposed that the book of Isaiah was composed by at least two authors: Isaiah son of Amoz (chs. 1–39, 8th century BC) and an anonymous author of the Babylonian exile (~550 BC), called Deutero-Isaiah (chs. 40–55), with some proposing a further Trito-Isaiah (chs. 56–66) from the post-exilic period. The arguments are: an abrupt shift in tone (from judgment to consolation), the presupposition of the exile as already occurring (40:1–2), and the naming of Cyrus king of Persia (44:28; 45:1) — who lived ~150 years after Isaiah.
The conservative tradition responds that the mention of Cyrus is precisely genuine prophecy — a sovereign God can name a future king, just as he named Josiah in 1 Kings 13:2 with 300 years' advance notice. The NT treats the book as a unity: John 12:38–41 quotes Is 53:1 and Is 6:10 together, attributing both to "Isaiah." Jesus cites Is 61:1–2 as being fulfilled in himself (Luke 4:18–21). The Isaiah Scroll from Qumran (2nd century BC) shows no division between chapters 39 and 40 — the scribes treated it as a single work.
The question remains open among scholars. For Christian faith, what matters is that the voice of the book, whether from one or multiple authors, is a voice inspired by the Spirit of God — and its witness to Christ remains the sharpest in all the OT.
In ~734 BC, King Ahaz faced the coalition of Syria and Israel (the Northern Kingdom) threatening Jerusalem and planning to depose him. Isaiah goes to meet him with his son Shear-jashub (whose name means "a remnant shall return" — a walking prophecy) and offers a divine sign. Ahaz piously declines: "I will not ask, and I will not put the Lord to the test" (7:12) — in reality because he had already decided to appeal to Assyria, and accepting a divine sign would have obligated him to trust God.
Isaiah then declares the uninvited sign: "Therefore the Lord himself will give you a sign. Behold, the virgin shall conceive and bear a son, and shall call his name Immanuel" (7:14). In the immediate context, the text points to a child born in Ahaz's own time as a sign of victory over the two threatening kings (7:16). But Matthew 1:23 quotes this text explicitly for Jesus — the dual fulfillment characteristic of biblical prophecy: an immediate historical sense and a deeper eschatological sense.
The Hebrew word 'almah (young woman of marriageable age) was translated in the LXX by parthenos (virgin) — and that is the translation Matthew uses. The debate between "virgin" and "young woman" carries enormous christological implications. The Christian reading holds that the Holy Spirit guided the LXX translators to capture the deeper meaning — the full fulfillment that Ahaz could not have imagined.
The opening of chapter 40 is one of the most dramatic in the Bible: "Comfort, comfort my people, says your God. Speak tenderly to Jerusalem, and cry to her that her warfare is ended, that her iniquity is pardoned." (40:1–2). After 39 chapters of severe judgment, the word that opens the second half of the book is comfort. The imperative is doubled in Hebrew — nakhamu, nakhamu — intensity of tenderness.
What follows is one of the most sublime theological poems in all of Scripture: God is compared to the shepherd who carries the lambs in his bosom (40:11), to the craftsman who weighed the mountains in scales (40:12), to the sovereign before whom the nations are as "a drop from a bucket" (40:15). The stars are counted and named by him (40:26). And then the promise for the exhausted: "They who wait for the Lord shall renew their strength" (40:31). The greatness of God does not distance him from the weak — it is precisely what makes the renewal of the prostrate human possible.
The fourth Servant Song (52:13–53:12) deserves careful reading. 52:13–15: the Servant will be exalted — but first disfigured beyond human appearance. Kings will shut their mouths before him. The scandal of suffering precedes exaltation.
53:1–3: the Servant is rejected — without appealing form, despised, familiar with grief. "We hid our faces from him" — active rejection, not mere indifference. 53:4–6: the central inversion of the text. The sorrows that appeared to be divine punishment on him were actually our sorrows. He was wounded for our transgressions. "All we like sheep have gone astray" (53:6) — the guilt is universal; the punishment was concentrated on one.
53:7–9: death of an innocent man. Silent as a sheep, buried with the wicked, yet with a rich man in his death (fulfilled in John 19:38–42 — buried in Joseph of Arimathea's tomb). 53:10–12: the final paradox. God willed to crush him — but the result is that he sees offspring, prolongs his days, justifies many. Suffering is not a terminal tragedy — it is an instrument of redemption. The entire NT is commentary on these three verses.
Chapters 40–48 contain the most devastating critiques of idolatry in ancient literature. Isaiah describes a craftsman who cuts down a tree: he uses half to warm himself and cook his food, and from the other half he makes an idol and prostrates himself before it, praying: "Save me, for you are my god!" (44:17). The sarcasm is precise: whoever worships what he made with his own hands deceives himself — "He feeds on ashes; a deluded heart has led him astray, and he cannot deliver himself or say, 'Is there not a lie in my right hand?'" (44:20).
The critique is not merely religious — it is epistemological. The idolater cannot see what he is doing. His heart has been deceived (44:20). Idolatry is, for Isaiah, a cognitive disturbance — the inability to distinguish Creator from creature, subject from object, true from false. Hence the cure for idolatry is not merely religious obedience but illumination — seeing clearly what is real. The Lord presents himself as the only one who declares the end from the beginning (44:7–8) — proof of sovereignty that no idol can offer.
"Fear not, for I am with you; be not dismayed, for I am your God; I will strengthen you, I will help you, I will uphold you with my righteous right hand."
Isaiah 41:10 — ESV