Apostate prophet has heart issues; Function of qalb in the Quran?

In answer to the video "43 Scientific Mistakes in the Quran"

In the Quran, there are physical and spiritual senses. One can have for instance the physical eye to see the material world without the spiritual eye which is necessary to see the spiritul world

7:179,10:42-3,22:46"For surely it is not the eyes that are blind, but blind are the hearts which are in the breasts".

One can have the mind/aql to process material information while being totally unable to deduct the spiritual implications inherent in all material things, because of a hardenned QALB/heart 2:73-4. The Hebrew Bible too is repleat with such references

Ezek12:2,Jer5:13"they have eyes yet they see not, they have ears yet they hear not".

A more striking metaphore for spiritual perception used by the Quran is the phrase

"possessors of hands and vision"

when speaking of some of the most eminent prophets who mastered their selves outwardly with great power (hands) and internally (vision, ie insight) 38:45. These verses speak of spiritual insight, not the material or wordly hearing, vision and deductions. The more one trains his spiritual receptivity the more it becomes aware of spiritual matters and the more God increases its capacity to perceive

91:7-10"And (by) a soul and He Who proportioned it. And inspired it with its wickedness and its virtue. One has succeeded whoever purified it. And one has failed whoever corrupted it".

With the prophet Muhammad, that capacity reached such a high peak that the spiritual vision could perceive the powerful angel of revelation, an entity invisible to the physical eye. The Quran precisely states in 53:12 that it was the heart, not the eye, that "saw". This is how intricately and flawlessly the Quran connects its ideas throughout its passages.

These verses describe the working of spiritual, not intellectual processing in the human body. The spiritual organs, eyes or ears (the list isnt meant to be exhaustive) have their same physical counterpart but do not converge in the same nervous system. While the physical organs like the eyes and ears, converge in the nervous system of the brain, the spiritual nervous system converges in the heart. Hence the often repeated notion that the blinding of the heart causing one to be unable to see and hear the spiritual world.

The physical attributes and the intellect arent enough when it comes to spiritual perception, one needs an open and receptive heart which translates the information gathered from the physical senses into spiritual language. This way one hears and sees both with his physical senses and spiritual senses.

The Quran says the QALB/heart is where spiritual insight and deductions occur, and further locates it in the the SADR 22:46,49:7.

SADR means CHEST, as well as the additional conceptual meaning of container of secrets. The Quran doesnt say that the source of intellectual, material, wordly thought is in the sadr/chest and as shown, one may have the aql/mind but lack the capacity to deduct the spiritual implications because of a hardened heart. Elsewhere the Quran says that the origin of lying and deception is in the forehead region, again pointing to it being aware that intellectual thought processes occur in the head 96:13-16, not the heart.