Isaiah 45
Isaiah 45 — Commentary and Meaning
The short answer
Isaiah 45 opens with a shock. God addresses Cyrus, the Persian emperor, as "his anointed"—the same word behind "messiah." Cyrus is not an Israelite. He does not worship Israel's God. Yet God says, "I have called you by your name... though you have not known me" (45:4). God is raising up this foreign ruler to conquer Babylon and send the Jewish exiles home to Jerusalem. The scandal is deliberate: the God of Israel is free to work through anyone, including people who have never heard of him.
The chapter presses the point further. If a pagan emperor can be God's instrument, does that mean the world is run by many competing gods? Isaiah answers with some of the fiercest monotheism in the Bible. "I am Yahweh, and there is no one else" (45:5). God forms light and creates darkness; there is no rival power behind the scenes. The idols of the nations are nothing. And the chapter closes with a sweeping promise: "to me every knee shall bow, every tongue shall take an oath" (45:23). Every nation, in the end, will acknowledge the one true God.
Hold those two threads together and you see what the chapter is really about: God's freedom. He is free to use outsiders like Cyrus, unconstrained by the boundaries his own people might draw around him. And he is free to reveal himself in ways no one expects. Centuries later, the New Testament makes the boldest move of all, applying the "every knee shall bow" language of 45:23 to Jesus. The God who shares his glory with no one, it turns out, shares it with the Son. Isaiah 45 does not just describe an ancient political rescue—it opens a window onto how surprising the one true God can be.
What scholars say
These two scholars take up the chapter's twin surprises: David Beckmann asks what it means that God's chosen rescuer is a Persian emperor who doesn't know him, while N.T. Wright shows how Paul takes the fierce monotheism of Isaiah 45:23 and dares to apply it to Jesus.
“The personality of the Lord is consistent over the biblical millennia—patient and forgiving, insistent on morality (especially justice toward people in need), and intolerant of phony gods. Yet the Lord of the Bible is full of surprises. When the Jews are exiles in Babylon, the Lord sends a savior to allow them to return to Jerusalem. But who is that savior? Cyrus, the Persian emperor! The Persians conquered Babylon, and the Persians have a more tolerant policy toward conquered peoples. The prophet Isaiah sees the Lord calling Cyrus to be his servant: “I call you … though you do not know me” (Isaiah 45:4). God’s movement in history is not limited to the efforts of people who believe in God.”
“Paul is quite clear that he’s not moving away from Jewish monotheism. In verse 11 he quotes Isaiah 45.23, a fiercely monotheistic Old Testament passage (‘To me and me alone, says YHWH , every knee shall bow and every tongue shall swear’). Here, then, is his point: the God who will not share his glory with anyone else has shared it – with Jesus. Jesus, therefore, must somehow be identified as one who from all eternity was ‘equal with God’. And his progression through incarnation to death must be seen, not as something which required him as it were to stop being God for a while, but as the perfect self-expression of the true God.”
What it means for you
Isaiah 45 unsettles a quiet assumption many of us carry: that God only works through people who believe in him, or through institutions we would recognize as religious. Cyrus never knew the God who called him, yet he became the instrument of Israel's rescue. That should make us slower to declare where God cannot be at work—in a difficult coworker, a secular movement, an unexpected turn of history. It should also make us humbler about our own role. God's purposes do not depend on our recognition of them, and his rescue may arrive from a direction we would never have chosen. The invitation is to watch for God's freedom rather than police his boundaries.
Isaiah 45 in context
Isaiah 45 sits in the section of Isaiah (chapters 40–55) addressed to Jewish exiles in Babylon, generations after the Assyrian crisis of the book's opening chapters. These chapters announce comfort: the exile is ending, and God is bringing his people home. Chapter 44 ends by naming Cyrus as God's shepherd, and chapter 45 develops that claim, defending God's right to use a foreign king and insisting there is no other god. The chapters that follow mock Babylon's idols and celebrate the coming return to Jerusalem.