In Sermon (91), Imam Ali (peace be upon him) addresses the issue of the Khawarij and the dangers posed by the Umayyad rulers. This sermon was delivered during a time of intense internal conflict among Muslims, particularly with the emergence of the Khawarij who rose against Imam Ali (a.s.). The Imam emphasizes his insight and knowledge regarding these seditions and their implications.

He states that when sedition arises, it plunges people into darkness, making it difficult to distinguish between truth and falsehood. This is a crucial point as the identification of sedition can be challenging, and its consequences are often devastating. The Imam specifically identifies the sedition of Banu Umayyah as particularly perilous, noting that its effects are widespread yet its severity is often felt by specific individuals.

Continuing, Imam Ali (a.s.) warns that after him, the Umayyad rulers will be the worst for the people, making it exceedingly difficult to seek justice from them, akin to a slave seeking justice from his master. This analogy reflects the dire situation people will find themselves in under their rule. He also makes it clear that he and the Ahl al-Bayt (peace be upon them) will be safe from these seditions and will not call people towards them.

This sermon teaches us the importance of knowledge and insight during times of sedition. Imam Ali (a.s.) advises the people to benefit from his knowledge, as there will be no one to answer their questions when he is gone. This is a significant lesson that the pursuit of knowledge is essential, especially in perilous times.

The Imam's sermon also reminds us to trust in the insight of our leaders and to follow their guidance to avoid sedition. It serves as a reminder that learning from the lessons of history and maintaining a strong faith is crucial.