حدثنا أبي - رحمه الله - قال: حدثنا سعد بن عبد الله، عن أحمد بن محمد بن عيسى، عن الحسن بن محبوب، عن أبي حمزة الثمالي، عن أبي جعفر عليه السلام قال: القلوب ثلاثة: قلب منكوس لا يعي على شئ من الخير وهو قلب الكافر، وقلب فيه نكتة سوداء فالخير والشر فيه يعتلجان  فما كان منه أقوى غلب عليه، وقلب مفتوح فيه مصباح يزهر ولا يطفأ نوره إلى يوم القيامة وهو قلب المؤمن.
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.