====== sense-impression ======

The subject that perceives a sense-object must itself be single, and grasp this object in its totality, by one and the same power. This happens when by several organs we perceive several qualities of a single object, or when, by a single organ, we embrace a single complex object in its totality, as, for instance, a face. It is not one principle that sees the face, and another one that sees the eyes; it is the “same principle” which embraces everything at once. Doubtless we do receive a SENSE-IMPRESSION by the eyes, and another by the ears; but both of them must end in some single principle. How, indeed, could any decision be reached about the difference of SENSE-IMPRESSIONs unless they all converged toward the same principle? The latter is like a centre, and the individual sensations are like radii which from the circumference radiate towards the centre of a circle. This central principle is essentially single. If it was divisible, and if SENSE-IMPRESSIONs were directed towards two points at a distance from each other, such as the extremities of the same line, they would either still converge towards one and the same point, as, for instance, the middle (of the line), or one part would feel one thing, and another something else. It would be absolutely as if I felt one thing, and you felt another, when placed in the presence of one and the same thing (as thought Aristotle, de Anima). Facts, therefore, demonstrate that sensations centre in one and the same principle; as visible images are centred in the pupil of the eye; otherwise how could we, through the pupil, see the greatest objects? So much the more, therefore, must the sensations that centre in the (Stoic) “directing principle” resemble indivisible intuitions and be perceived by an indivisible principle. If the latter possessed extension, it could, like the sense-object, be divided; each of its parts would thus perceive one of the parts of the sense-object, and nothing within us would grasp the object in its totality. The subject that perceives must then be entirely one; otherwise, how could it be divided? In that case it could not be made to coincide with the sense-object, as two equal figures superimposed on each other, because the directing principle does not have an extension equal to that of the sense-object. How then will we carry out the division? Must the subject that feels contain as many parts as there are in the sense-object? Will each part of the soul, in its turn, feel by its own parts, or will (we decide that) the parts of parts will not feel? Neither is that likely. If, on the other hand, each part feels the entire object, and if each magnitude is divisible to infinity, the result is that, for a single object, there will be an infinity of sensations in each part of the soul; and, so much the more, an infinity of images in the principle that directs us. (This, however, is the opposite of the actual state of affairs.) (Ennead IV,7 (2) 6)

The same reflections may be made about pain, and one’s feeling of it. When a man’s finger is said to give him pain, this, no doubt, is a recognition that the seat of the pain is in the finger, and that the feeling of pain is experienced by the directing principle. Consequently, when a part of the spirit suffers, this suffering is felt by the directing principle, and shared by the whole soul. How can this sympathy be explained? By relay transmission, (the Stoic) will answer; the SENSE-IMPRESSION is felt first by the animal spirit that is in the finger, and then transmitted to the neighboring part, and so on till it reaches the directing part. Necessarily, if the pain is felt by the first part that experiences it, it will also be felt by the second part to which it is transmitted; then by the third, and so on, until the one pain would have caused an infinite number of sensations. Last the directing principle will perceive all these sensations, adding thereto its own sensation. Speaking strictly, however, each of these sensations will not transmit the suffering of the finger, but the suffering of one of the intermediate parts. For instance, the second sensation will relay the suffering of the hand. The third, that of the arm, and so on, until there will be an infinity of sensations. The directing principle, for its part, will not feel the pain of the finger, but its own; it will know none but that, it will pay no attention to the rest, because it will ignore the pain suffered by the finger. Therefore, relayed sensation is an impossibility, nor could one part of the body perceive the suffering felt by another part; for the body has extension, and, in every extension, parts are foreign to each other (the opposite of the opinion of Cleanthes, Nemesius). Consequently, the principle that feels must everywhere be identical with itself; and among all beings, the body is that which is least suitable to this identity. (Ennead IV,7 (2) 7)

Now, to enter into details, let us first say that one does not necessarily retain all one has seen. When something is neither interesting nor important, the senses, impressed by the diversity of objects without our voluntary direction of consciousness, are alone affected; the soul does not perceive the impressions because there is no utility in them for her. When the soul is turned towards herself, or towards other objects, and when she applies herself to them entirely, she could not remember these indifferent things, for she does not even perceive them when they are present. Neither is it necessary that the imagination should represent to itself what is accidental; nor, if it does represent them to itself, that it should retain them faithfully. It is easy to be convinced that a SENSE-IMPRESSION of this kind is not perceived, on the ground of the following arguments. In the act of walking we divide, or rather traverse the air, without any conscious purpose; consequently we neither notice it, nor think of it, while we press forward. Likewise, if we had not decided to take some particular road, and unless we could fly through the air, we would not think of the region of the earth where we are, nor of the distance we have traveled. This is proved by the fact that when the mind possesses the general knowledge of what occurs, and is sure that the things will occur as planned, a man no longer attends to details. Besides, if a person continues to do the same thing, it would be useless to continue to observe the similar details. Consequently if the stars, while following their courses, carry out their duties without attending to the occurrence of what goes on; and unless their chief duty is to observe occurrences or the occurrence itself; and if their progress is nothing more than accidental, while their attention is held by other and greater objects; and if they regularly continue to pass through the same orbit without considering the calculation of time, even if it had already been divided (under these four conditions); there is no need to suppose that these stars would have a memory of the places they pass by, or of their periods. Their life would be uniform; because they always travel through the same places, so that their movement is, so to speak, more vital than local, because it is produced by a single living being (the universe), which, realizing it within itself, is exteriorly at rest and interiorly in motion by its eternal life. (Ennead IV,4 (28) 8)