Al-Khiṣāl > There are four types of sin
Hadith #1

4-36 حدثنا محمد بن علي ماجيلويه رضي الله عنه قال: حدثنا علي بن إبراهيم ابن هاشم، عن أبيه، عن محمد بن أبي عمير قال: ما سمعت ولا استفدت من هشام بن الحكم في طول صحبتي له شيئا أحسن من هذا الكلام في عصمة الامام، فاني سألته يوما عن الامام أهو معصوم؟ فقال: نعم، فقلت: فما صفة العصمة فيه؟ وبأي شيء يعرف؟ فقال: إن جميع الذنوب [لها] أربعة أوجه لا خامس لها: الحرص والحسد والغضب والشهوه فهذه منفية عنه، لا يجوز أن يكون حريصا على هذه الدنيا وهي تحت خاتمه لانه خازن المسلمين فعلى ماذا يحرص، ولا يجوز أن يكون حسودا لان الانسان إنما يحسد من فوقه وليس فوقه أحد فكيف يحسد من هو دونه، ولا يجوز أن يغضب لشئ من امور الدنيا إلا أن يكون غضبه لله عز وجل، فان الله عز وجل قد فرض عليه إقامة الحدود وأن لا تأخذه في الله لومة لائم ولا رأفة في دينه حتى يقيم حدود الله عز وجل ولا يجوز له أن يتبع الشهوات ويؤثر الدنيا على الآخرة لان الله عز وجل حبب إليه الآخرة كما حبب إلينا الدنيا فهو ينظر إلى الآخرة كما ننظر إلى الدنيا، فهل رأيت أحدا ترك وجها حسنا لوجه قبيح وطعاما طيبا لطعام مر، وثوبا لينا لثوب خشن، ونعمة دائمة باقية لدنيا زائلة فانية

4-36 Muhammad ibn Ali Majiluyih - may God be pleased with him - narrated that Ali ibn Ibrahim ibn Hashim quoted his father, on the authority of Muhammad ibn Abi Umayr, “During the long time I have associated with Hisham ibn al-Hakam, the most beneficial to me has been what he said regarding the Immaculateness of the Divine Leaders. One day I asked him about the Immaculateness of a Divine Leader. I asked him, ‘Is a Divine Leader Immaculate?’ He replied, ‘Yes, he is.’ I asked him, ‘What does that imply and how can we tell?’ He replied, ‘Indeed all sins are due to the following four (and there is no fifth reason): greed, jealousy, anger, and lustful desires. None of these exist in a Divine Leader. A Divine Leader cannot be greedy toward this world, since greediness arises from poverty and all the world is under the Imam’s ring and he is the treasurer of the Muslims in this respect. So why should he be greedy? A Divine Leader cannot be jealous, since man would be jealous of what is above him, not what is lower than him. However, there is no one higher than a Divine Leader. So how could he be jealous of anyone who is lower than himself? A Divine Leader cannot get angry at any worldly affairs unless it be for what angers the Honorable the Exalted God. The Honorable the Exalted God has made him responsible to establish the limits. Therefore, it is natural for him to get angry at those who blame him for doing so, and be nice to some regarding their religion so as to uphold the Honorable the Exalted God’s established limits. A Divine Leader cannot follow lusts since he has already preferred the Hereafter over this world. Indeed, the Honorable the Exalted God has shown him the preferable attributes of the Hereafter just as we see the preferable attributes of this world. He looks at the Hereafter the way we look at this world. So how could he then prefer this world over the Hereafter? How could one abandon looking at a beautiful face and look at an ugly face instead? How could one pick a bad tasting dish instead of a delicious one? How could one prefer a rough attire over a soft one? How could one abandon the everlasting blessings of the Hereafter for the ephemeral pleasures of this world?’”