The everlasting God,
the Creator of the ends of the earth,
neither faints nor is weary.
His understanding in unreachable.
He gives power to the weak;
He increases strength.
Even the youths shall faint and be weary,
and utterly fall,
But those who wait on the Lord
shall renew their strength;
They shall mount up with wings like eagles,
They shall run and not be weary,
they shall walk and not faint.
--- Isaiah 40:28-32