Isaiah 40:31
King James Version
“But they that wait upon the LORD shall renew their strength; they shall mount up with wings as eagles; they shall run, and not be weary; and they shall walk, and not faint.”
New International Version
“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.”
Commentary
The Hebrew word for "hope/wait" (qavah) means to wait with taut, expectant tension — like a rope pulled tight. This is not passive resignation but active, straining expectation directed at God. The renewal is graduated in a counterintuitive order: soaring (most demanding), then running, then walking — addressing every level of depletion, from the completely exhausted (who needs to be borne up) to the merely tired (who needs stamina for ordinary steps). The eagle soars not by furious wing-beating but by catching thermals it did not create; the renewal comes not from human effort but from God. Isaiah places this at the end of a sustained argument about God's greatness (vv. 12-30): given who this God is, the promise of renewal for those who wait on him is not surprising.