Do you not know? Have you not heard?
The Lord is the everlasting God, the Creator of the ends of the earth.
He will not grow tired or weary, and his understanding no one can fathom.
He gives strength to the weary and increases the power of the weak.
Even youths grow tired and weary, and young men stumble and fall;
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.
Source: Chapter 40, verses 28-31, in the book of Isaiah in the Old Testament. The author is believed to be one of Isaiah’s disciples, writing from Babylon, the capital city of Southern Mesopotamia (Babylonia) from the early 2nd millennium to the early 1st millennium BCE.