This is a very comforting bible verse that we can run to in trouble:

Isaiah 40: 28-31

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. 
²⁹ He gives strength to the weary 
    and increases the power of the weak.
³⁰ Even youths grow tired and weary,
    and young men stumble and fall; 
³¹ 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.