Letter (69) to Haris Hamdani is a significant communication in which Imam Ali (a.s.) presents his message in a clear and comprehensive manner. This letter was written at a time when Imam Ali (a.s.) felt the need for the betterment of Islamic society and the guidance of Muslims. In this letter, Imam emphasizes the importance of the Qur'an, the remembrance of death, and social ethics.

Imam Ali (a.s.) begins the letter by instructing to hold fast to the rope of the Qur'an. This is an important message that the Qur'an should be the central focus of one's life and its guidance should be followed. He emphasizes that what is halal should be considered halal and what is haram should be regarded as haram. This is a fundamental principle that holds great significance in Islamic teachings.

The letter also reminds the reader of death and the afterlife. Imam Ali (a.s.) states that one should not seek death, but at the same time, one should be prepared for it. This is a spiritual lesson that a person should live their life in a way that they are accountable before Allah.

Imam advises against paying attention to people's gossip and also mentions that if one hears something about someone, they should not let it affect them. This is a moral lesson that we should not weaken ourselves by being influenced by others' words.

The importance of controlling anger and forgiving others is also highlighted in this letter. Imam Ali (a.s.) mentions that when one has power, they should forgive, as this will lead to their success. This is a practical advice that we should strive to control our anger.

In conclusion, Imam Ali (a.s.) advises Muslims to live collectively and emphasizes the importance of staying away from places where there is a lack of support for obedience to Allah. This is a practical guidance that we should choose aspects of our lives that contribute to our spiritual growth.