Isaiah 40:29
What does Isaiah 40:29 mean?
He gives power to the weak. He increases the strength of him who has no might.
The short answer
Isaiah 40:29 makes a simple, sweeping claim: "He gives power to the weak." The verse doesn't say God rewards the strong, or tops up the reserves of people who are managing fairly well. It says God gives strength to the person "who has no might" — the one whose resources have run out entirely.
That wording matters, because of who first heard it. Isaiah 40 opens with the words "Comfort, comfort my people," addressed to Israel in exile — a community that had lost its land, its temple, and its confidence that God was still with it. The book of Lamentations, written out of that same catastrophe, repeats the bleak refrain that there is no comforter. Isaiah 40 is the answer to that refrain. It announces that the season of abandonment is ending and that God is coming to restore his people. Verse 29 belongs to that announcement: it is comfort for people who have been honest about having nothing left.
So the verse is not generic encouragement, the spiritual equivalent of a motivational poster. It is a targeted promise. The chapter has just contrasted God's endless strength — he "doesn't faint" and "isn't weary" — with human frailty, where even the young "utterly fall." The point of the contrast is not to shame the weak but to redirect them. Strength, in this chapter, is not something you summon from within; it is something God supplies from outside, precisely because he never runs dry.
Read this way, Isaiah 40:29 says something bracing: admitting you are depleted is not the obstacle to receiving God's strength. It is the qualification. The verse is addressed to the exhausted, and it names exhaustion not as the end of the story but as the moment God's power arrives.
What scholars say
These excerpts answer why Isaiah 40's word of comfort landed with such force: Goldingay shows that Lamentations' repeated cry that there is no comforter was true for the moment but not forever — Isaiah 40 is God's reversal of it — while Wright describes how that chapter's message of hope, forgiveness, and healing after exile echoed through Israel's life for centuries.
“The people who pray this poem don’t know, but for later readers like us, its fivefold reference to there being no comforter offers paradoxical reassurance. During the decades when the poem is being used in Jerusalem, Yahweh will give the order, “Comfort, comfort my people” (Isaiah 40). “There’s no comforter” is the truth about the situation at the moment, but things won’t be that way forever.”
“That message had echoed through the life of the Jewish people for hundreds of years by the time of John the Baptist , ever since it was first uttered in Isaiah 40. It was part of the great message of hope, of forgiveness, of healing for the nation after the horror of exile . God would at last come back, bringing comfort and rescue. Yes, John is saying; that’s what’s happening now. It’s time to get ready! The king, God himself, is coming back! Get ready for God’s kingdom ! And John’s striking message made everyone sit up and take notice. In today’s language, they saw the blue flashing lights and stopped what they were doing to get ready.”
What it means for you
Most of us try to hide depletion — from others, and sometimes from God — as if weakness were the one thing we must never admit. Isaiah 40:29 turns that instinct on its head. The promise is specifically for the person with no might left, which means honesty about your exhaustion is where the promise begins, not where it fails.
If you're in a season where the honest report is "I have nothing left," this verse invites you to say so plainly and then to wait on the God who does. The strength on offer here isn't self-generated resilience; it's a gift, given to those who have stopped pretending they can produce it themselves.
Isaiah 40 in context
Isaiah 40 opens a new movement in the book. After chapters of warning and judgment, the tone shifts abruptly: "Comfort, comfort my people," God says to a nation in exile. A voice announces a highway for God's return, the chapter celebrates his incomparable power — he measures the waters in his hand and treats nations like dust on scales — and then turns that cosmic strength toward the weary. Verse 29 sits at the chapter's climax, just before the famous promise that those who wait for the Lord will renew their strength and "mount up with wings like eagles."