In Sermon (159), Imam Ali (a.s.) elaborates on the greatness of the religion of Islam and the transient nature of this world. This sermon was delivered at a time when it was crucial to instill a sense of the true essence of faith and the ephemeral nature of worldly life among Muslims. Imam highlights the magnificence of the Prophet Muhammad (s.a.w) and the significance of his teachings, emphasizing that the path of Islam is the only true path and that straying from it leads to inevitable misfortune.

Imam Ali (a.s.) states that Allah sent His Messenger with clear signs, a guiding book, and a comprehensive way of life. He emphasizes the superiority of the Prophet's lineage and the importance of his teachings. The message is clear: anyone who seeks a religion other than Islam is destined for misery, and this serves as a powerful reminder of the ultimate truth of Islam.

The Imam stresses the importance of piety (Taqwa) and obedience to Allah, asserting that it is the only means of salvation. By discussing the transient nature of the world, he urges people to prepare for the Hereafter instead of being engrossed in worldly pleasures. The Imam warns that the pleasures of this world are few and fleeting, and this reminder encourages us to focus on what truly matters.

He also refers to the fate of past nations as a cautionary tale, reminding us that all worldly achievements are temporary and that everyone will eventually face death. These examples serve to reinforce the notion that we must understand the reality of life and turn back to Allah.

In conclusion, Imam Ali (a.s.) advises that one must always fear Allah and remain conscious of Him, as everything has become clear. This teaches us to control our desires and seek the pleasure of Allah, guiding us toward a righteous path.