In Letter (18), Imam Ali (peace be upon him) addresses Abdullah Ibn Abbas, the governor of Basra. This letter was written during a time when Imam Ali (a.s) had assumed the responsibilities of leadership and was guiding various governors in different regions. Basra was an important city inhabited by various tribes, and its political and social situation was complex. In this letter, Imam Ali (a.s) emphasizes the importance of treating the people of Basra with kindness, especially the Bani Tamim tribe, which has held a prominent position in both Jahiliyyah and Islam.

Imam Ali (a.s) also mentions the presence of Satan in Basra and the rise of fitnah (trials) in the area, making it essential to keep the inhabitants happy and to relieve their hearts from fear. The aim is for the people to live in peace and tranquility, enabling them to bring about positive changes in their lives. This conveys an important message that leadership is not just about wielding power and authority, but also about fostering love and trust in the hearts of the people.

Imam Ali (a.s) specifically warns Abdullah Ibn Abbas against treating Bani Tamim harshly, as there is also a kinship connection with them. This implies that it is a virtuous act to consider and maintain social bonds, and neglecting them can lead to sin. It serves as a vital lesson that we should strive to strengthen our social relationships, particularly with those who are related to us.

Another significant point made by Imam Ali (a.s) is to avoid haste in actions. This teaches us that every action has its time and manner, and we should make decisions with careful consideration. This is a spiritual lesson that encourages us to understand the consequences of our actions and to reflect upon them. Imam Ali (a.s) speaks of his good opinion of Ibn Abbas, which signifies a positive intention, highlighting its importance.

In conclusion, Imam Ali (a.s) ends the letter with a prayer for Abdullah Ibn Abbas. This prayer is crucial for a leader, as it seeks Allah's mercy, which is essential for successful leadership. This letter teaches us that the ultimate goal of leadership is to serve the people and cultivate love in their hearts.