The reason for the occurrence of healing or its absence when reading from one surah to another over a sick person

The questioner : Yes. Honorable Shaykh, may Allah bless you. Sometimes a person says, "I feel pain, so I read over myself in the name of Allah the Mighty and Majestic."

The Shaykh : Or a feeling?

The questioner : For a specific pain, for example. So I raise myself, so what is there? Allah the Mighty and Majestic, through short methods.

The Shaykh : Yes.

The questioner : And sometimes it is the same reading and the same pain, but the pain lasts and does not subside.

The Shaykh : So he says, what is it?

The questioner : Because he is not healed as he was healed another time.

The Shaykh : Yes, it is known that the matter is in the hand of Allah the Mighty and Majestic. Not every cause has an effect. Causes do not have an effect in themselves. There may be a barrier, or Allah the Mighty and Majestic may have intended to reserve for this supplicant what is better. Or Allah the Mighty and Majestic may want to elevate this one who was afflicted with illness to the rank of the patient, because patience is a high rank that is not attained except by the presence of that which one is patient over. Look at the Messenger (peace and blessings be upon him). Was he not afflicted with fever as two men would be? Yes, even though he was the intimate friend of Allah the Mighty and Majestic.
But in order to attain the rank of patience, he (peace and blessings be upon him) attained the rank of patience with the decrees of Allah, and he attained the rank of patience in obedience to Allah. He called people while they were harming him, fighting him, and killing his Companions, and he was patient with this calling. And patience regarding the prohibitions of Allah is well known.