"O Brother! Not every sea hath pearls; not every branch will flower, nor will the nightingale sing thereon. Then, ere the nightingale of the mystic paradise repair to the garden of God, and the rays of the heavenly morning return to the Sun of Truth—make thou an effort, that haply in this dustheap of the mortal world thou mayest catch a fragrance from the everlasting garden, and live forever in the shadow of the peoples of this city. And when thou hast attained this highest station and come to this mightiest plane, then shalt thou gaze on the Beloved, and forget all else."