Charles Spurgeon Commentary Isaiah 40:29-30

"He giveth power to the faint; and to him that hath no might he increaseth strength. Even the youths shall faint and be weary, and the young men shall utterly fall:" — Isaiah 40:29-30 (ASV)

And to those who have no might he increases strength. Even the youths shall faint and be weary, and the young men shall utterly fall:

We sometimes wish that we were as young as some, and that we had all their overflowing spirit – all the effervescence of their juvenile ardor. Ah, well! We need not wish for it, for mere mortal power shall droop and die, and earthly vigor cease, while those who trust the Lord shall find their strength increased. Even the youths shall faint and be weary, and the young men shall utterly fall.