In Sermon (188), Imam Ali (a.s.) begins by praising Allah and expressing gratitude for His bounties. This sermon is set against a significant historical backdrop, during a time when the Islamic community faced various challenges. Imam Ali emphasizes the importance of piety (taqwa), the reality of death, and the horrors of the Day of Judgment. It serves as a profound admonition for those who are sincere in their obedience to Allah and His Messenger (peace be upon him).

He states that the death of one who possesses knowledge of Allah, His Messenger, and Ahl al-Bayt (a.s.) is martyrdom. This conveys a crucial message that for those who recognize Allah and His teachings, their death is a great reward. He also discusses the difficulties of death, such as the constriction of the grave, the terrors of Barzakh, and the frightening scenes of the Day of Judgment. These reminders urge individuals to comprehend the reality of life and prepare for their hereafter.

The significance of piety is highlighted in this sermon. Imam Ali (a.s.) asserts that through piety, a person becomes deserving of Allah's mercy and forgiveness. It is a path that protects one from punishment and promises paradise. Furthermore, he stresses the necessity of understanding the transient nature of the world, as life is fleeting and will eventually come to an end.

Imam Ali advises his followers to prepare their deeds, as there will be no opportunity to return after death. This is a vital message that emphasizes the need for individuals to strive for righteous actions in their lives to be worthy of Allah's mercy on the Day of Judgment. Finally, he concludes by stating that whoever dies on their bed while having knowledge of Allah and His Messenger will die a martyr, and their reward is upon Allah.