50. We were told by my father, may Allah grant him mercy, that he said: We were told by Sa’d bin Abdullah, from Ahmad bin Muhammed bin Isa, from Hasan bin Mahbub, from Abu Hamza al-Thumali, from Abu Ja’far, peace be upon him, that he said: Hearts are (of) three (types): a capsized heart that does not comprehend anything of goodness, and that is the heart of a disbeliever; a heart in which there is a black mark, and so, good and evil are wrestling in it, and that which is the strongest will dominate it; and an open heart in which there is a lamp that radiates and whose light is not extinguished until the Day of Resurrection, and that is the heart of a believer.