One aaya in Sura al-Imran which is one of the strongest reminders and strengtheners of faith is aaya 173, “For us Allah sufficeth, and He is the best disposer of affairs" (3:173).
This aaya reiterates the fact that Allah is sufficient, He is enough for us, and He, the Almighty is the only one we should have complete faith in. He is the best disposer of affairs and He subhanahuwatallah knows what is best for us. We may sometimes think we know what is best, but the Almighty is the only one who has the entire universe under His control.
The lesson to be taken from this is that we should be thankful for everything Allah swt has blessed us with, and that we should be patient in all times of hardship because Allah swt is the best handler of our affairs and He is the only one who can give us justice in this duniya and in the hereafter.