We know things only by knowing their name {recognizable code} and dimensions/ features. And we can perceive them only when we have converted both as neurological interpretation and observation and saved/captivated them in the memory {عقل}. The faculty of listening is for recognizing the name/code of the things; vision {بصر not نظر which refers to eye ball, mere looking/glancing} determines the dimension/features by focusing eye sight on some thing and heart and brain interpret and determine its compatibility/relativity with other things which enable its storage/captivation in the memory of the brain. Memory is like the hard disk and heart is like the monitor of computer. Data stored in the memory is useless and meaningless until it can be retrieved and seen on the screen of the monitor. If the screen of the computer or the heart of a man becomes blind, the data stored in the memory/hard disk would be of no value even it could be retrieved since it would be merely dots/ neurological signal.

Knowledge is only of  ءَايَةً , corporeal, real thing having dimensions; and the words of Allah sent in Qur'aan are also called ءَايَةً since it is said by Him Who knows visible and invisible of everything. Therefore when something is said by All Knower, that is as visible as anything else to the perception of human beings. Anything beyond  ءَايَةً is nothing but conjecture, تخيل, imagination, false, farse. Compressing/preserving/captivating data/information about things is called "عقل" and the process by which we keep comparing/sorting things and finding the difference and relationships is called "تعقل, يعقل" i.e. to reflect/ponder/process the acquired data/information/knowledge to arrive at conclusions/guidance.

The pursuit of things and matter would give knowledge about the relationship and nature of things and it involves nothing but a desire and effort since every thing is measured and proportioned and appropriated in relation to everything else. Matter is in measure and then disciplined in a cohesive single unit by the choice of attraction and repulsion amongst things. The relationships are not subject to change. But this is the knowledge of the visible and apparent.

Wisdom is acquired only when the invisible of the matter/relationship {باطن} becomes visible/ perceivable through vision and intellect. But the remote past and remote future is beyond our vision and perception. Notwithstanding what distance we could cover in the past and the future we can never say with confidence/certainty that we have reached and seen/perceived the things at the point of beginning or ending in future. We can never encompass the matter in its entirety not only because of its extremely voluminous and diversified nature but also because we know the skies are expanding all the time, therefore if we can manage to reach its today's last boundary/limit it would have gone farther the moment we reach the point we thought is the ending point. It is an endless pursuit; this is the limitation of our capability of vision and intellect. We will always end up in a closed street.

Knowledge is primarily divided into two branches; knowledge of things/matter and what happened/was talked about by the people/their dialogues/habits/acts in the past. The knowledge about the matter is verifiable in time and space. Anything said by anyone/book regarding physical matters could be subjected to verification in time and space about its truth to an exact detail. If we find the words of a book relating to physical matters written earlier in time as true and factually and materially correct in all respects then we will have to believe too, in those statements of the Book which narrate some events/dialogues between people of past/historical statements. The falsification test of any book/statement could be the physical one. The facts mentioned in the Qur'aan about the Universe and human body is in itself also the falsification test of the Book.

The code/name and physical presence/existence of the things are bits of data transformed into information. If only one thing comes into the vision of a human being, would it get printed/saved in his memory? For answering this simple question we need not be specialists in psychology, nerves and brain. The answer is in negative. The saving/retention of information about the dimensions and code of a thing in the memory is possible only, and is obliged to existence of more than one and contrasting thing enabling comparative study/observation of those. The comparative study and the information about the variations, differences, measures, and relationships is the primary reason which enables their saving and preservation in the memory. The variation, difference, and relationship are at least between the two.

Let us reflect for a second, that had everything of the universe not been in pairs-duals-male female-positive-negative, was it possible for us, what to say of gaining knowledge and admonishment, even to talk and explain?

It is a matter of common sense that a man can reflect/ponder/process/analyze only after he has acquired data/information about something. Allah has quite unambiguously informed that knowledge about the universe and human body will progressively reveal to humanity since acquiring of knowledge needs constant and persistent pursuit of things to find mutual relationships. The Grand Qur'aan has informed that Allah will keep enabling the people to visually observe the hitherto invisible realities prevalent everywhere in the universe and within human body, in order that it may become manifest to the people that the Qur'aan is a statement of proven fact. Why would it become manifest that the Qur'aan is a statement of proven fact when man sees/perceives new knowledge about universe and human body? If the things mentioned in a book written earlier in time and space are subsequently found a scientific fact only then it is evident to people that the Book is really a statement of proven facts and is not conjectural and presumptive.

If the pursuit of knowledge and wisdom is understood as gaining information about things and their relationship, and finding the nature of things and universe, then it is no more than "wandering" because even if we know everything about everything it will bring us back to the point from where we started this pursuit of knowledge. The destination of the pursuit of knowledge is to know the purpose behind the creation of a thing. A thing is created for a purpose in mind, it is a matter and knowledge of simple common sense. And when we find and conclude that a thing is created with a purpose behind it we find and realize about a creator behind that thing since purpose is related only to a person. The purpose invariably introduces us to the creator of the thing. It is only "تفكر" that could make one realize it.

Once we reach the stage of understanding that there is a purpose in the creation of everything which in itself creates a conviction that it is for a determined period since the very fact of creation with a purpose implies a predetermined period of the "life" of the thing; We immediately come to the question of the purpose of our own creation. Let us listen to the Grand Qur'aan.

A man, reaching at the point of attaining the capability of reflection, confronts the physical and social worlds and wants to enquire about it. In the above statement the entire physical world, one could perceive and find around him, has been compacted in just nineteen words. The test of a Book, which claims to be a Guide in time and space and  that this is void of any conjectural and wishful material, is that a reader of ordinary and low intellect should also not get confused/perplexed in perceiving what is being stated otherwise he may loose interest in the Book and may not get guidance there from. And if the Book makes a demand from the reader then it must give him a plausible reason to admit and obey that.

The man is told that his Sustainer Lord is the One Who spread for him the earth like carpet and made the sky above him looking as canopy and from the sky sent water with which He produced everything for his sustenance. This is in short the entire universe which is within the reach of the eyes and perception of any man. Everything is interrelated, they are just one unit. Earth and sky are interrelated, sky and water are interrelated and water and the produce of earth have inter relationship. Vision is the primary source of acquiring knowledge. The whole universe is in the vision of human mind like an inter dependent unit. It is matter of common knowledge and perception that a unit is managed, owned and controlled by one therefore men should not consider and hold equals and partners with Allah. And then the Qur'aan unfolds the facts and knowledge of the universe in detail.