As-Sayyid ar-Radi says: Amir al-mu'minin is right in saying that there is no reward for sickness as such because compensation is admissible in respect of the acts of Allah, the Sublime, towards his creatures such as grief, illness and the like, whereas reward and recompense becomes admissible against actions by the creature. This is the difference between the two and Amir al-mu'minin has clarified it through his lustrous knowledge and sound view.