[Their Contradiction of the Imperatives of Reason and Analogy]

As for their opposition to the inescapable dictates of reason and sound analogy, not one of them can apply his own principle consistently. When a person beholds the Divine decree without distinguishing between what is commanded and what is forbidden, and is therefore treated in accordance with that view—for example, he is beaten, left hungry, and afflicted with severe pains and ailments—then, should he blame or censure the one who treated him so, he has demolished his own claim and abandoned the root of his doctrine. It can be said to him: “This action, too, is something decreed and ordained; Allah’s creation, decree, and will encompass both you and him alike. If the decree is a proof for you, it is equally a proof for him; and if it is not a proof for him, it is not a proof for you either.” Thus, by the sheer necessity of reason, the unsoundness of the view that fixes its gaze on the decree while ignoring command and prohibition becomes evident.

[What Allah’s Law and Decree Require in Practice]
[The Servants’ Need for Seeking Forgiveness]

The believer is instructed to carry out what has been enjoined, to avoid what has been forbidden, and to show patience toward whatever has been decreed. Allah, Exalted is He, says, “If you are patient and mindful of Allah, their schemes will never harm you in the least” (Q 3:120); and He says in the story of Joseph, “Indeed, whoever is mindful of Allah and patient—surely Allah does not allow the reward of those who excel to go to waste” (Q 12:90). God-fearingness means doing what Allah has commanded