What is the wisdom behind belief in divine decree and destiny?

Question:
He says: Honorable Shaykh, may Allah grant you success, what is the wisdom behind belief in divine decree and destiny, or in other words, what is its worldly benefit?

Answer:
If you do not know the wisdom and benefit of belief in divine decree and destiny, then there is no power or might except in Allah. The benefit is clear and the wisdom is clear: you are patient with calamities and decrees over which you have no control, so you must be patient. Patience is required, and it is among the characteristics of the believers. That is one point. The second is that you do not become distressed or angry with the decree and destiny of Allah, but rather you believe that this is by His decree, and that if Allah had willed, such and such would not have happened. What Allah willed came to be, and what He did not will did not happen. You believe in this and find rest. Also, belief in divine decree and destiny drives you to strive in the path of Allah, to seek sustenance, to... Yes.