According to the belief of a Sufi the heart is the shrine of God, and when the doors of the shrine are closed it is just like a light being hidden under a bushel. The pupil sees that God is love. If He is love He does not stay in the heavens; His earthly body is the heart of man. When that heart is frozen and when there is no love but bitterness, coldness, prejudice and contempt, unforgiving feelings and hatred -- which all come from one source: want of tolerance, the feeling, "I am different and you are different" -- then that spirit and that light of God, that divine essence that is in the heart of man, is buried as in a tomb. The work that one has to do is to dig it up, as one would dig the ground until one touched the water underneath.