Attar of Nishapur, a 12th-century mystical poet, gives a mystical interpretation of the Quranic story of the descent of Adam and Eve from Paradise to Earth. According to Attar, "the man whose mind and vision are ensnared by heaven's grace must forfeit that same grace, for only then can he direct his face To his true Lord." Occasionally, a verse may be interpreted in a sense very different from its conventional meaning. For example, Hamadani, in his book "Tamheedat" ('Preludes'), interprets ("It is a fierce fire created by God, to penetrate into the hearts."), which conventionally refers to the punishment in hell, to be the passion of divine love. Hamadani interprets ("On the Day when the earth is changed into another earth, and the heavens, and they will emerge before God"), which conventionally describes the Day of Judgment as a description of the moment of spiritual awakening or enlightenment. Sufis believe that Quran's initial letters (Muqatta'at) conceal mysteries that can not be fully expressed in words and should be understood as mystic experiences. In Sufi commentaries of the Quran, Sufism concepts are commonly related such as the hierarchical levels of realities in human experience (human, supra-sensible, and divine levels), the various states of consciousness such as sustaining in hell ("khaledeen in gahanm") and residing in paradise ("khaldeed in janna"), and the ideas concerning the six subtleties ("lataif-e-sitta").