Isaiah 40:28-30

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;

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