Enneads III.6: Of the Impassibility of Incorporeal Entities (Soul and and Matter)
Psychological Explanation of Virtue or Vice of Appetite
Further, the soul's appetite is intemperate when it alone is active; for then, in the absence of the principles that ought to command or direct her, it alone does everything. Besides, the rational part, whose function it is to see (by considering the notions it receives from intelligence), is occupied with something else, for it does not do everything simultaneously, being busy with some other action; it considers other than corporeal things, so far as it can.[37] Perhaps also the virtue or vice of the appetite depend considerably on the good or evil condition of the organs; so that, in either case, nothing is added to the soul.
THE SOUL ORIGINATES MOVEMENTS, BUT IS NOT ALTERED (AGAINST STOICS). POLEMIC AGAINST THE STOIC THEORY OF PASSIONS.
3. There are desires and aversions in the soul, which demand consideration. It is impossible to deny that pain, anger, joy, appetite and fear are changes and affections which occur in the soul, and that move her.[38] We must here draw a distinction, for it would be denying the evidence to insist that there are in us no changes or perception of these changes. We cannot attribute them to the soul, which would amount to the admission[39] that she blushes, or grows pale, without reflecting that these "passions," though produced by the soul, occur in a different substance. For the soul, shame consists in the opinion that something is improper; and, as the soul contains the body, or, to speak more exactly, as the body is a dependency of the animating soul, the blood, which is very mobile, rushes to the face. Likewise, the principle of fear is in the soul; paleness occurs in the body because the blood concentrates within the interior parts. In joy, the noticeable dilation belongs to the body also; what the body feels is not a "passion." Likewise with pain and appetite; their principle is in the soul, where it remains in a latent condition; what proceeds therefrom is perceived by sensation. When we call desires, opinions and reasonings "movements of the soul," we do not mean that the soul becomes excited in the production of these movements,[40] but that they originate within her. When we call life a movement, we do not by this word mean an alteration; for to act according to one's nature is the simple and indivisible life of each part of the soul.
VIRTUE AND VICE AFFECT THE SOUL DIFFERENTLY FROM ALL THE OTHER PASSIONS.
In short, we insist that action, life and desire are not alterations, that memories are not forms impressed on the soul, and that actualizations of the imagination are not impressions similar to those of a seal on wax.[41] Consequently in all that we call "passions" or "movements," the soul undergoes no change in her substance (substrate) or "being" (nature); virtue and vice in the soul are not similar to what heat, cold, whiteness or blackness are in bodies; and the soul's relation to vice and virtue is entirely different, as has been explained.
PASSIONAL CHANGES OCCUR IN THE BODY, NOT EVEN TO THE PASSIONAL PART OF THE SOUL.
4. Let us now pass to that part of the soul that is called the "passional" (or, affective). We have already mentioned it,[42] when treating of all the "passions" (that is, affections), which were related to the irascible-part and appetitive part of the soul; but we are going to return to a study of this part, and explain its name, the "passional" (or, affective) part. It is so called because it seems to be the part affected by the "passions;"[43] that is, experiences accompanied by pleasure or pain.[44] Amidst these affections, some are born of opinion; thus, we feel fear or joy, according as we expect to die, or as we hope to attain some good; then the "opinion" is in the soul, and the "affection" in the body. On the contrary, other passions, occurring in an unforeseen way, give rise to opinion in that part of the soul to which this function belongs, but do not cause any alteration within her, as we have already explained. Nevertheless, if, on examining unexpected fear, we follow it up higher, we discover that it still contains opinion as its origin, implying some apprehension in that part of the soul that experiences fear, as a result of which occur the trouble and stupor which accompany the expectation of evil. Now it is to the soul that belongs imagination, both the primary imagination that we call opinion, and the (secondary) imagination that proceeds from the former; for the latter is no longer genuine opinion, but an inferior power, an obscure opinion, a confused imagination which resembles the action characteristic of nature, and by which this power produces each thing, as we say, unimaginatively.[45] Its resulting sense-agitation occurs within the body. To it relate trembling, palpitation, paleness, and inability to speak. Such modifications, indeed, could not be referred to any part of the soul; otherwise, such part of the soul would be physical. Further, if such part of the soul underwent such affections these modifications would not reach the body; for that affected part of the soul would no longer be able to exercise its functions, being dominated by passion, and thus incapacitated.
THE SOUL’S AFFECTIVE PART MAY BE THE CAUSE OF AFFECTIONS; BUT IS INCORPOREAL.
The affective part of the soul, therefore, is not corporeal; it is a form indeed, but a form engaged in matter, such as the appetite, the power of growth, both nutritive and generative, a power which is the root and principle of appetite, and the affective part of the soul. Now a form cannot undergo an affection or a passion, but must remain what it is. It is the matter (of a body) which is capable of being affected by a "passion" (an affection), when this affection is produced by the presence of the power which is its principle. Indeed it is neither the power of growth that grows, nor the nutritive power that is fed; in general, the principle that produces a motion is not itself moved by the movement it produces; in case it were moved in any way, its movement and action would be of an entirely different nature.[46] Now the nature of a form is an actualization, by its mere presence producing (something), just as if the harmony alone could cause the vibration of the strings of a lyre. Thus the affective part (of the soul, without itself being affected) is the cause of the affections, whether the movement proceed from it, that is, from sense-imagination, or whether they occur without (distinct) imagination.
THE AFFECTIONS OF THE SOUL COMPARED TO A MUSICIAN PLAYING THE LYRE.
We might further consider whether, inasmuch as opinion originates in a higher principle (of the soul), this principle does not remain immovable because it is the form of harmony, while the cause of the movement plays the role of the musician, and the parts caused to vibrate by the affection, that of the strings; for it is not the harmony, but the string that experiences the affection; and even if the musician desired it, the string would not vibrate unless it were prescribed by the harmony.
PASSIONS ARE PRODUCED BY EXTERNAL IMAGES; AND THEIR AVOIDANCE IS THE TASK OF PHILOSOPHY.
5. If then, from the very start, the soul undergo no affections, what then is the use of trying to render her impassible by means of philosophy? The reason is that when an image is produced in the soul by the affective part, there results in the body an affection and a movement; and to this agitation is related the image of the evil which is foreseen by opinion. It is this affection that reason commands us to annihilate, and whose occurrence even we are to forestall, because when this affection occurs, the soul is sick, and healthy when it does not occur. In the latter case, none of these images, which are the causes of affections, form within the soul. That is why, to free oneself from the images that obsess one during dreams, the soul that occupies herself therewith is to be wakened.[47] Again, that is why we can say that affections are produced by representations of exterior entities, considering these representations as affections of the soul.
PSYCHOLOGICAL PROCESS INVOLVED IN PURIFYING THE SOUL, AND SEPARATING SOUL FROM BODY.
But what do we mean by "purifying the soul," inasmuch as she could not possibly be stained? What do we mean by separating (or, weaning) the soul from the body? To purify the soul is to isolate her, preventing her from attaching herself to other things, from considering them, from receiving opinions alien to her, whatever these (alien) opinions or affections might be, as we have said; it consequently means hindering her from consideration of these phantoms, and from the production of their related affections. To "purify the soul," therefore, consists in raising her from the things here below to intelligible entities; also, it is to wean her from the body; for, in that case, she is no longer sufficiently attached to the body to be enslaved to it, resembling a light which is not absorbed in the whirlwind (of matter[48]), though even in this case that part of the soul which is submerged does not, on that account alone, cease being impassible. To purify the affective part of the soul is to turn her from a vision of deceitful images; to separate her from the body, is to hinder her from inclining towards lower things, or from representing their images to herself; it means annihilating the things from which she thus is separated, so that she is no longer choked by the whirlwind of the spirit which breaks loose whenever the body is allowed to grow too strong; the latter must be weakened so as to govern it more easily.
Introduction to the Escorial Numenian Fragment
6. We have sufficiently demonstrated the impassibility of intelligible "being" which is entirely comprised within the genus of form. But as matter also, though in another manner, is an incorporeal entity, we must examine its nature also. We must see whether it may be affected, and undergo every kind of modification, as is the common opinion; or whether, on the contrary, it be impassible; and in this case, what is the nature of its impassibility.