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