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Faith & Trust6 min readยท

Mounting Up on Wings: Isaiah 40:31 and the Renewal of Strength

Isaiah 40 was written to people who were exhausted โ€” exiled, forgotten, and convinced that God had stopped paying attention. Its promises are as fresh as the day they were given.

"But those who hope in the Lord will renew their strength. They will soar on wings like eagles; they will run and not grow weary, they will walk and not be faint."

Isaiah 40:31 (NIV)

Isaiah 40 begins in the middle of a crisis. The people of Israel are in exile โ€” or soon will be โ€” torn from their homeland, their temple in ruins, their national identity shattered. More than that, they feel forgotten. They articulate this feeling in verse 27: "My way is hidden from the Lord; my cause is disregarded by my God."

This is the deep wound the chapter is written to address: not just the practical suffering of exile, but the theological despair beneath it. The feeling that God has looked away. That the suffering is proof of abandonment. That heaven has gone silent.

The answer God gives through Isaiah is not a quick fix. It is a sustained argument โ€” and it builds to one of the most beloved promises in the Old Testament.

Who Has Measured the Waters?

Before offering comfort, God establishes credentials. "Who has measured the waters in the hollow of his hand, or with the breadth of his hand marked off the heavens?" (Isaiah 40:12). The questions continue for several verses โ€” a kind of divine interrogation designed to recalibrate the listener's sense of who they are dealing with.

This is not intimidation. It is perspective. A God of this magnitude โ€” who stretches out the heavens like a canopy, who regards the nations as a drop in a bucket (40:15) โ€” is not a God who has simply failed to notice Israel's suffering. He is a God who is entirely capable of acting, which means the delay has a purpose, even if that purpose is not yet visible.

"He gives strength to the weary," verse 29 announces, "and increases the power of the weak." The God who made everything can surely make strength for people who have run out of it. The logic is simple and the promise is direct.

"Those Who Hope in the Lord"

Verse 31 opens with a conditional: "those who hope in the Lord." The Hebrew word here is qavah โ€” to wait, to expect, to look toward with anticipation. It is the posture of someone who has not given up but is still oriented toward the source of their expectation. Not passive resignation. Not frantic effort. Active, attentive waiting.

This kind of hope is the hardest thing to maintain in exile. When the temple is gone, when the homeland is a memory, when the suffering has gone on so long that it starts to feel like the permanent state of things โ€” qavah is the discipline of still looking. Of saying, even in the valley, "I believe something is coming."

Eagles, Running, Walking

The promise moves through three levels โ€” and notably, it moves from the dramatic to the ordinary. First, "they will soar on wings like eagles" โ€” the high, exhilarating moments of spiritual lift, when God feels close and prayer feels powerful and the whole horizon is visible. These happen. But they are not constant.

Then "they will run and not grow weary" โ€” the seasons of active, demanding service where energy is required and sustaining it is no small feat. God promises renewal here too: the ability to keep going without burning out.

Finally, "they will walk and not be faint." This is the least dramatic and perhaps the most profound. Walking. The daily showing up. The ordinary Tuesday. The grief that is still there on a Monday morning. The faithful continuation in circumstances that have not changed. This, God promises, is also sustained. Not just the eagle moments. Not just the running seasons. But the long, slow, faithful walk through ordinary time.

For the Genuinely Exhausted

This passage was written for people who were tired in ways that sleep couldn't fix. The exile was not just a practical hardship โ€” it was an attack on everything that had given their lives meaning. Their identity as God's people, their experience of His presence, their sense that history was moving toward something โ€” all of it called into question by the circumstances.

If you are in a season like that โ€” not just physically tired, but weary in soul, wondering if God has gone quiet, wondering if the story is going somewhere โ€” Isaiah 40:31 is addressed to you specifically. Not to people who have it together. Not to people who are soaring. To the weary. To the faint.

Hope in the Lord. Look toward Him. Not because looking makes your circumstances change immediately, but because He is the only source of strength that is truly renewable. Everything else runs out. He does not grow tired or weary (40:28). And He gives His inexhaustible strength to those who are running on empty.

The eagle moments will come. The running seasons will come. And on the days when all you can do is walk without fainting โ€” that, too, will be sustained. Wait for it.

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Isaiah 40strengthhopeeaglesexhaustionwaitingrenewal

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Scripture Lives

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