They Shall Mount Up with Wings: Isaiah 40:31 Explained

Isaiah 40:31 states: “But they who wait for the Lord shall renew their strength; they shall mount up with wings like eagles, they shall run and not be weary; they shall walk and not faint.” This powerful promise has been memorized, quoted, and cherished by generations of believers seeking comfort and courage in times of trial. But what does it really mean to “mount up with wings like eagles”? Why is waiting on the Lord so essential, and how does this waiting translate into renewed strength?

The Historical Context: Consolation in Exile

To understand Isaiah 40:31, we must first step into the historical setting of Isaiah 40. This chapter marks a dramatic shift in the book of Isaiah, opening what scholars call “Second Isaiah” or “Deutero-Isaiah.” The prophet is now addressing the people of Israel during or just before their Babylonian exile—a time of national trauma, displacement, and despair. Jerusalem had fallen, the Temple lay in ruins, and many of God’s people found themselves far from home, wondering if God had abandoned them.

It is in this context of deep discouragement that Isaiah 40 sounds forth its message of comfort: “Comfort, comfort my people, says your God” (Isaiah 40:1). The chapter unfolds with soaring descriptions of God’s majesty, power, and tender care. God is depicted as both the mighty Creator, who stretches out the heavens, and the gentle Shepherd, who gathers his lambs.

Against the backdrop of Israel’s weakness and helplessness, God’s inexhaustible strength and faithfulness are emphasized. Verse 31 is the climax of this encouragement—a promise that those who wait on the Lord will exchange their weakness for God’s strength.

The Meaning of “Waiting on the Lord”

The key to unlocking Isaiah 40:31 lies in the phrase “they who wait for the Lord.” The Hebrew word translated “wait” (qavah) carries a rich meaning, encompassing hope, trust, and patient expectation. It is not passive resignation or idle inaction, but a purposeful, active stance of looking to God with anticipation.

For the exiles, this waiting meant trusting that God’s promises would be fulfilled, even when their circumstances seemed hopeless. It meant holding on to faith that God would act on their behalf, restore their fortunes, and bring them home. In a world that often prizes instant results and self-sufficiency, the call to wait on the Lord is countercultural. It acknowledges human limitations and places ultimate confidence not in human ability, but in divine faithfulness.

“Renew Their Strength”: Exchange, Not Just Replenishment

The promise that those who wait for the Lord “shall renew their strength” goes beyond the idea of simply getting a boost of energy or a second wind. The Hebrew word used here can also mean “exchange” or “replace.” The picture is of those who, in their weakness, receive a complete exchange of their depleted strength for God’s inexhaustible power.

This is a radical promise. The exiles, worn down by years of suffering, were not being told to find strength within themselves, but to rely on the One whose strength never fails. For modern readers, the message is the same: true renewal comes not from our own reserves, but from God’s unending resources. Whether we are facing physical exhaustion, emotional burnout, or spiritual weariness, God offers to exchange our weakness for his strength—if we are willing to wait on him.

The Eagle Imagery: Soaring Above the Storm

One of the most stirring aspects of Isaiah 40:31 is the imagery of mounting up with wings like eagles. In the ancient world, the eagle was a symbol of power, freedom, and transcendence. Eagles soar high above the earth, catching thermal currents and gliding effortlessly for miles. Their vision is sharp, their flight majestic.

For Israel’s exiles, the image would have conjured thoughts of liberation from oppression, of rising above the limitations of their current circumstances. Eagles do not escape storms; rather, they use the wind to lift them higher, soaring above the storm clouds. In the same way, those who wait on the Lord are not promised a life free from hardship, but the ability to rise above it—to gain perspective, strength, and endurance that are not their own.

The eagle motif also evokes earlier biblical references. In Exodus 19:4, God reminds Israel, “I bore you on eagles’ wings and brought you to myself,” recalling the deliverance from Egypt. Isaiah’s promise thus draws on a rich tradition of God as the One who rescues and sustains his people.

Running and Not Growing Weary: Endurance for the Journey

The promise continues: “they shall run and not be weary; they shall walk and not faint.” The order here is significant. First, the vision soars—mounting up with wings like eagles—then it moves to running, and finally to walking. While soaring moments of inspiration are exhilarating, much of life consists of running the race and walking the long, steady path of daily faithfulness.

Running speaks to times of urgency, challenge, or opportunity—moments when life demands everything we have. Walking points to the ordinary, sometimes monotonous, routines of life. Isaiah assures us that God’s strength is available not just for the dramatic moments, but for the long haul, for the daily grind, for the faithful plodding that is often the substance of real discipleship.

Application for Today: Waiting in a Fast-Paced World

What does it mean to wait on the Lord in our world of instant gratification, digital distractions, and relentless busyness? Isaiah 40:31 invites us to slow down and cultivate the spiritual discipline of waiting—of trusting God’s timing, seeking his guidance, and relying on his strength rather than our own.

Waiting on the Lord involves prayer, reflection, and obedience. It means bringing our anxieties, burdens, and exhaustion to God, and allowing him to renew us from the inside out. It also means refusing to run ahead of God’s purposes or give in to despair when answers are slow in coming. In a culture that often views waiting as wasted time, Isaiah calls us to see it as sacred time—a season for God to work in us and through us.

Stories of Renewal: Testimonies of Strength

Throughout history, countless believers have found in Isaiah 40:31 a source of hope and renewal. Missionaries facing daunting challenges, parents enduring sleepless nights, workers persevering in thankless jobs, and saints enduring persecution have all drawn courage from this promise. Their stories remind us that God’s strength is made perfect in weakness, and that waiting on the Lord is never in vain.

Personal testimonies often echo the progression of Isaiah’s imagery: moments of soaring inspiration, seasons of running with endurance, and years of faithful walking. No matter the circumstance, the promise holds true: those who wait for the Lord will find strength to rise, to run, and to keep moving forward.