However...
However, this harm does not imply that there is anything wrong with the food or water. On the contrary, it is for the sake of their illness. Certainly, those who are mentally sick, in accepting the Divine and pure verses are upset like the ones whose body is ill, for they will be provoked as soon as they are confronting the truth, and they become obstinate immediately following its presentation, then they turn away from the Truth.
And this is the very meaning of /yudill/ (leaves to stray) mentioned in the verse. A Discussion on Leading and Misleading Divine leadership is of two kinds: the primary leadership and the supplementary leadership. The Divine leadership concerns all mankind. The Qur’an says: “Verily We showed him the Way…” [^1] However, supplementary leadership only concerns those who have already accepted the former general guidance.
For instance, take the case of a teacher who offers his course in an identical and monotonous way to all his students. After sometime, he tends to do more favor to those of his students who are more strenuous and hard-working. The Qur’an says: “And (as for) those who follow the right direction, He increases them in guidance…” [^2] And there are those who refuse to accept all the Divine verses as the Qur’an says about them.
“And there never came unto them any sign from the signs of their Lord but they turned away from it…” [^3] “And had We sent down unto you a book, written on a paper, so that they touched it with their own hands, certainly (still) the disbelievers would have said: ‘That is naught but a manifest sorcery’.” [^4] “…And (even) if they witness a miracle, they will not believe in it…” [^5] Would there be any other way of dealing with them except restraining them from favors and stamping them with the discarding seal?
Anyway, Allah is Wise and Just and He does all according to: “…He guides whomever He pleases…” [^6] and “…leaves to stray whomever He wills…” [^7] and “…Allah provides with sustenance for whomever He wills…” [^8] and “He will forgive him whom He wills” and “He will punish whom He wills…” [^9] and “He creates whatever He pleases…” [^10] All the above are to be rendered into the basis of His Justice, Wisdom, Grace, and Favour.
That is, once He says: “…He guides whomever He pleases…” it does not imply that He leads, regardless of all criteria, whomever He wants.