The soul becomes happy when there is happiness in the heart; it becomes miserable when there is misery in thought. The soul rises high with the height of imagination; the soul probes the depths with the depth of thought. The soul is restless with the restlessness of the mind, and it attains peace when the mind is peaceful. None of the above conditions of mind changes the soul in its real nature, but for the time being it seems to be so. The soul is a bird of paradise, a free dweller in the heavens. Its first prison is the mind, then the body. In these it becomes not only limited, but captive. The whole endeavor of a Sufi in life is to liberate the soul from its captivity, which he does by conquering both mind and body.