If, however, the body derive its vegetative power from the Whole and from this (universal) Soul which is one, why should it not derive it also from our soul? Because that which is nourished by this power forms a part of the universe, which possesses sensation only at the price of “suffering.” As to the SENSE-POWER which rises as far as the judgment, and which is united to every intelligence, there was no need for it to form what had already been formed by the Whole, but it could have given its forms if these forms were not parts of the Whole which produces them. (Ennead IV,9 (8) 3)
Other principles remain unmoved while producing and exhibiting their (”hypostases,” substantial acts, or) forms of existence. The (universal) Soul, however, is in motion while producing and exhibiting her (”substantial act,” or) forms of existence, namely, the functions of sensation and growth, reaching down as far as (the sphere of the) plants. In us also does the Soul function, but she does not dominate us, constituting only a part of our nature. She does, however, dominate in plants, having as it were remained alone there. Beyond that sphere, however, nature begets nothing; for beyond it exists no life, begotten (matter) being lifeless. All that was begotten prior to this was shapeless, and achieved form only by trending towards its begetting principle, as to its source of life. Consequently, that which is begotten cannot be a form of the Soul, being lifeless, but must be absolute in determination. The things anterior (to matter, namely, the SENSE-POWER and nature), are doubtless indeterminate, but only so within their form; the are not absolutely indeterminate; they are indeterminate only in respect of their perfection. On the contrary, that which exists at present, namely, (matter), is absolutely indeterminate. When it achieves perfection, it becomes body, on receiving the form suited to its power. This (form) is the receptacle of the principle which has begotten it, and which nourishes it. It is the only trace of the higher things in the body, which occupies the last rank amidst the things below. (Ennead III,4 (15) 3)
Is the power which is the act of the soul always united to a body? No; for when the soul turns towards the superior regions, she raises this power with her. Does the universal (Soul) also raise with herself to the intelligible world the inferior power which is her actualization (nature)? No: for she does not incline towards her low inferior portion, because she neither came nor descended into the world; but, while she remains in herself, the body of the world comes to unite with her, and to offer itself to receive her light’s radiation; besides, her body does not cause her any anxiety, because it is not exposed to any peril. Does not the world, then, possess any senses? “It has no sight” (says Plato) “for it has no eyes. Neither has it ears, nostrils, nor tongue.” Does it, then, as we, possess the consciousness of what is going on within it? As, within the world, all things go on uniformly according to nature, it is, in this respect, in a kind of repose; consequently, it does not feel any pleasure. The power of growth exists within it without being present therein; and so also with the SENSE-POWER. Besides, we shall return to a study of the question. For the present, we have said all that relates to the question in hand. (Ennead III,4 (15) 4)
By the mere fact that it feels by means of the entire body, every SENSE-POWER undergoes division. Since it is present everywhere, it may be said to be divided. But as, on the other hand, it manifests itself everywhere as a whole, it cannot really be considered as divided. We cannot go further than the statement that it becomes divisible in bodies. Some might object that it was divided only in the sense of touch. It is however also divided in the other senses, since it is always the same body that receives it, but only less so. The case is the same with the power of growth and nutrition; and if appetite have its seat in the liver, and anger in the heart, these appetites must be subject to the same conditions. Besides, it is possible that the body does not receive those appetites in a mixture, or that it receives them in some other manner, so that they result from some of the things that the body derives from the soul by participations. Reason and intelligence, however, are not communicated to the body because they stand in no need of any organs to fulfil their functions. On the contrary, they find in them only an obstacle to their operations. (Ennead IV,3 (27) 19)
On the other hand, as the power of sensation and the power of appetite, which belong to the sensible and imaginative soul, are beneath reason, because they are related to what is inferior, while reason is above, the result was that the ancients localized reason in the highest part of the animal, in the head; not that reason is in the brain, but because reason is seated in the SENSE-POWER, by the intermediation of which, only, reason may be said to reside in the brain. The SENSE-POWER, surely, had to be attributed to the body, and, within the body, to the organs most capable of lending themselves to its action. Reason, which has no (direct) dealing with the body, had however to be in relation with the SENSE-POWER, which is a form of the soul, and can participate in reason. The SENSE-POWER, does, to a certain extent, judge; and the power of imagination has something intellectual. Last, the appetite, and the desire somehow connect with imagination and reason. Reason, therefore, is in the head, not as in a locality, but because it is in relation with the SENSE-POWER which resides in that organ, as has been shown above. (Ennead IV,3 (27) 23)
What is the relation of the SENSE-POWER within the superior Soul (or, in the rational soul)? Intelligible sensation perceives (intelligible) objects that, speaking strictly, are not sensible, and corresponds to the (intelligible) manner in which they are perceivable. Thus (by this intelligible SENSE-POWER) the Soul perceives the supersensual harmony and also the sensual, but in a manner such as the sense-man perceives it, relating it so far as possible to the superior harmony, just as he relates the earthly fire to the intelligible Fire, which is above, and which the superior Soul felt in a manner suitable to the nature of this fire. If the bodies which are here below were up there also, the superior Soul would feel them and perceive them. The man who exists on high is a Soul disposed in some particular manner, capable of perceiving these objects; hence the man of the last degree (the sense-man) being the image of the intelligible Man, has reasons (faculties) which are also images (faculties possessed by the superior Man). The man who exists in the divine Intelligence constitutes the Man superior to all men. He illuminates the second (the reasonable man), who in his turn illuminates the third (the sense-man). The man of this last degree somewhat possesses the two others; he is not produced by them, he is rather united to them. The man who constitutes us actualizes himself as the man of the last degree. The third receives something of the second; and the second is the actualization of the first. Each man’s nature depends on the “man” according to whom he acts (the man is intellectual, reasonable, or sensual according as he exercises intelligence, discursive reason, or sensibility). Each one of us possesses the three men in one sense (potentially); and does not possess them in another (in actualization; that is, he does not simultaneously exercise intellect, reason, or sense). (Ennead VI,7 (38) 6)
When the third life (the SENSE-POWER) which constitutes the third man, is separated from the body, if the life that precedes it (the discursive reason) accompany it without nevertheless being separated from the intelligible world, then one may say that the second is everywhere the third is. It might seem surprising that the latter, when passing into the body of a brute, should drag along that part which is the being of man. This being was all beings (potentially); only, at different times, it acts through different faculties. So far as it is pure, and is not yet depraved, it wishes to constitute a man, and it is indeed a man that it constitutes; for to form a man is better (than to form a brute), and it does what is best. It also forms guardians of the superior order, but such as are still conformable to the being constituent of manhood. The (intellectual) Man, who is anterior to this being, is of a nature still more like that of the guardians, or rather, he is already a divinity. The guardian attached to a divinity is an image of him, as the sense-man is the image of the intellectual man from whom he depends; for the principle to which man directly attaches himself must not be considered as his divinity. There is a difference here, similar to that existing between the souls, though they all belong to the same order. Besides, those guardians whom Plato simply calls “guardians” (demons), should be called guardian-like, or “demonic” beings. Last, when the superior Soul accompanies the inferior soul which has chosen the condition of a brute, the inferior soul which was bound to the superior soul-even when she constituted a man-develops the (”seminal) reason” of the animal (whose condition she has chosen); for she possesses that “reason” in herself; it is her inferior actualization. (Ennead VI,7 (38) 6)
Let us begin by a consideration of the soul. Does she possess self-consciousness? By what faculty? And how does she acquire it? It is natural for the SENSE-POWER to deal only with exterior objects; for even in the case in which it feels occurrences in the body, it is still perceiving things that are external to it, since it perceives passions experienced by the body over which it presides. (Ennead V,3 (49) 2)