It is said to them...
It is said to them: make an offer to a sound, reasonable man that he should sit idly and at ease and receive whatever he wants without any effort or work, and see whether he accepts this or not. You will find that he is more delighted with the little he receives out of his own efforts than the abundance he should receive undeservingly. So is the bliss of the hereafter. It is earned by man based on his own efforts and merits. The mercy bestowed on man in this aspect is too great.
If he is rewarded for his deeds in this life and shown the way to get that deservingly through his own efforts, delight and happiness with what he receives will be perfected to him. If they ask: is it not possible that some people rely on the goodness they get even if they do not deserve it? Then what excuse is there in preventing one who wants to attain the bliss of the hereafter due to this argument? It is said to them: if this were permitted to people, they would get the utmost rabies.
They would dare to commit all sins and vices and violate all forbidden limits. Who would refrain from sins or bear hardship in the way of virtues, and who would feel safe about himself, his family and his properties from people if he did not fear the punishment of the hereafter?
The harm of this matter would affect people in this life before the afterlife, and so justice and wisdom would be invalidated, and it would give an excuse to criticize the divine ordinance that it is not true and it puts things in other than their suitable places. These persons may talk about the misfortunes that afflict all people, whether good or bad, or the ones that afflict good people while bad people remain safe from them.
They ask: how is this possible in the wise ordinance of the Wise Ordainer, and what is the reason behind that? It is said to them: Allah has made these misfortunes, which afflict both good and bad people, as a reform for both kinds of people. That which afflicts good people increases the blessings of their Lord on them and that makes them thank Allah and be patient, while that which afflicts bad people makes them stop their evil and refrain from sins and vices.
These misfortunes also contain good for those who are not afflicted with them. As for the good people, they become delighted with the goodness and righteousness they are in and become more willing to continue on their way.