We cannot go through life strong and fresh on constant express trains with ten minutes for lunch: we must have quiet hours, secret places of the Most High, times of waiting upon the Lord, when we renew our strength and learn to mount up on wings as eagles, and then come back to run and not be weary, and to walk and not faint.
The best thing about this stillness is, that it gives God a chance to work. "He that is entered into His rest hath ceased from his own works, even as God did from His"; and when we cease from our thoughts, God's thoughts come into us; when we get still from our restless activity, "God worketh in us, both to will and to do of His good pleasure." ~A.B. Simpson