The Haftorah reading clearly echoes this theme:
27 Why do you say, O Jacob,
Why declare, O Israel,
"My way is hid from the Lord,
My cause is ignored by my God"?
28 Do you not know?
Have you not heard?
The Lord is God from of old,
Creator of the earth from end to end,
He never grows faint or weary,
His wisdom cannot be fathomed.
29 He gives strength to the weary,
Fresh vigor to the spent.
30 Youths may grow faint and weary,
And young men stumble and fall;
31 But they who trust in the Lord shall renew their strength
As eagles grow new plumes:
They shall run and not grow weary,
They shall march and not grow faint.
Actually, I struggled to take an excerpt out of this. It is all SO GOOD.