Cognition... is not an individual process of any theoretical particular consciousness. Rather it is the result of a social activity, since the existing stock of knowledge exceeds the range available to any individual.

The term "cognition" refers to all processes by which the sensory input is transformed, reduced, elaborated, stored, recovered, and used. It is concerned with these processes even when they operate in the absence of relevant stimulation, as in images and hallucinations. Such terms as sensation, perception, imagery, retention, recall, problem-solving, and thinking, among others, refer to hypothetical stages or aspects of cognition.

It should be obvious that by real thought I do not mean the superficial activities of the mind, such as reason, reflective thinking, ideation, cogitation, and logical argumentation. Rather, I mean the very root of human existence, which is consciousness, awareness, and understanding. The Islamic philosophical tradition usually referred to this root as ‘aql, intelligence. Thought in this sense is a spiritual reality that has being and life by definition. In contrast, the bodily realm is essentially dead and evanescent, despite the momentary appearance of life within it. Intelligence is aware, but things and objects are unaware. Intelligence is active, but things are passive. Intelligence is living, self-conscious, and dynamic, but things are empty of these qualities in themselves. In its utmost purity, intelligence is simply the shining light of the living God, a light that bestows existence, life, and consciousness on the universe. It is the creative command whereby God brought the universe into being, the spirit that God blew into Adam after having molded his clay, and the divine speech that conveys to Adam the names of all things.

Intelligence, then, is the ability to attain goals in the face of obstacles by means of decisions based on rational (truth-obeying) rules. The computer scientists Allen Newell and Herbert Simon fleshed this idea out further by noting that intelligence consists of specifying a goal, assessing the current situation to see how it differs from the goal, and applying a set of operations that reduce the difference. Perhaps reassuringly, by this definition human beings, not just aliens, are intelligent. We have desires, and we pursue them using beliefs, which, when all goes well, are at least approximately or probabilistically true.

Intelligence is not only the ability to reason; it is also the ability to find relevant material in memory and to deploy attention when needed.

Intelligence is the capacity to perceive the essential, the what is; and to awaken this capacity, in oneself and in others, is education.

If intelligence is to be understood as an unconditioned act of perception, its ground cannot be in structures such as cells, molecules, elementary particles, etc. Ultimately, anything that is determined by the laws of such structures must be in the field of what can be known, i.e. stored up in memory, and thus will have to have the mechanical nature of anything that can be assimilated in the basically mechanical character of the process of thought.

So science and art introduce us into the intimacy of a matter which the one thinks and the other manipulates. From this standpoint the intellect would, in principle, finally reach an absolute. It would then be completely itself. Vague at the outset because it was only a presentiment of matter, it takes shape more clearly the more precisely it knows matter. But precise or vague, it is the attention that mind gives to matter. How then could mind still be intellect when it turns upon itself? We can give things whatever names we choose and I see no great objection, I repeat, to knowledge of the mind by the mind still being called intelligence, if one insists. But then it will be necessary to specify that there are two intellectual functions, the one the inverse of the other, for mind thinks mind only in climbing back up the slope of habits acquired in contact with matter, and these habits are what one currently calls intellectual tendencies. Is it not better to designate by another name a function which certainly is not what one ordinarily calls intelligence? I call it intuition. It represents the attention that the mind gives to itself, over and above, while it is fixed upon matter, its object. This supplementary attention can be methodically cultivated and developed.

Intelligence is quickness to apprehend as distinct from ability, which is capacity to act wisely on the thing apprehended.

Intelligence is not merely the capacity which enables us to profit by experience; it is the function of personality which gives experience its past, present and future meaning. Habits belong to existence, intelligence to living. Life becomes a creative venture in proportion to the amount and quality of intelligence which accompanies conduct.

Human intelligence, or the intellect, cannot disclose to us the aseity of the Absolute, and no sensible person would ask this of it; the intellect can give us points of reference, and this is all that is necessary as regards discriminative and introductory knowledge, the knowledge that can be expressed through words. But the intellect is not only discriminative, it is also contemplative, hence unitive, and in this respect it cannot be said to be limited, any more than a mirror limits the light reflected in it; the contemplative dimension of the intellect coincides with the ineffable.

Intelligence is not the ability to store information, but to know where to find it.

The actual operation of intelligence is thus beyond the possibility of being determined or conditioned by factors that can be included in any knowable law. So, we see that the ground of intelligence must be in the undetermined and unknown flux, that is also the ground of all definable forms of matter. Intelligence is thus not deducible or explainable on the basis of any branch of knowledge (e.g., physics or biology). Its origin is deeper and more inward than any knowable order that could describe it. (Indeed, it has to comprehend the very order of definable forms of matter through which we would hope to comprehend intelligence.)

Everything which is, is thought, but not conscious and individual thought. The human intelligence is but the consciousness of being. It is what I have formulated before: Everything is a symbol of a symbol, and a symbol of what? of mind.