XLVIII. Lust is the immoderate desire and love of sexual intercourse.
Explanation.—This desire of sexual intercourse is usually called lust, whether it be held within bounds or not. I may add that the five last-mentioned emotions have no contraries, for moderation is a kind of ambition, and I have already observed that temperance, sobriety, and chastity show a power and not a passion of the mind. Even supposing that an avaricious, ambitious, or timid man refrains from an excess of eating, drinking, or sexual intercourse, avarice, ambition, and fear are not therefore the opposites of voluptuousness, drunkenness, or lust. For the avaricious man generally desires to swallow as much meat and drink as he can, provided only it belong to another person. The ambitious man, too, if he hopes he can keep it a secret, will restrain himself in nothing, and if he lives amongst drunkards and libertines, will be more inclined to their vices just because he is ambitious. The timid man, too, does what he does not will; and although, in order to avoid death, he may throw his riches into the sea, he remains avaricious; nor does the lascivious man cease to be lascivious because he is sorry that he cannot gratify his desire. Absolutely, therefore, these emotions have reference not so much to the acts themselves of eating and drinking as to the appetite and love itself. Consequently nothing can be opposed to these emotions but nobility of soul and strength of mind, as we shall see afterwards.
The definitions of jealousy and the other vacillations of the mind I pass over in silence, both because they are compounded of the emotions which we have already defined, and also because many of them have no names,—a fact which shows that, for the purposes of life, it is sufficient to know these combinations generally. Moreover, it follows from the definitions of the emotions which we have explained that, they all arise from desire, joy, or sorrow, or rather that there are none but these three, which pass under names varying as their relations and external signs vary. If, therefore, we attend to these primitive emotions and to what has been said above about the nature of the mind, we shall be able here to define the emotions in so far as they are related to the mind alone.
General definition of the emotions.—Emotion, which is called animi pathema, is a confused idea by which the mind affirms of its body, or any part of it, a greater or less power of existence than before; and this increase of power being given, the mind itself is determined to one particular thought rather than to another.
Explanation.—I say, in the first place, that an emotion or passion of the mind is a confused idea. For we have shown that the mind suffers only in so far as it has inadequate or confused ideas. I say again, by which the mind affirms of its body, or any part of it, a greater or less power of existence than before. For all ideas which we possess of bodies indicate the actual constitution of our body rather than the nature of the external body; but this idea, which constitutes the form of an emotion, must indicate or express the constitution of the body, or of some part of it; which constitution the body or any part of it possesses from the fact that its power of action or force of existence is increased or diminished, helped or limited. But it is to be observed, that when I say a greater or less power of existence than before, I do not mean that the mind compares the present with the past constitution of the body, but that the idea which constitutes the form of emotion affirms something of the body which actually involves more or less reality than before. Moreover, since the essence of the mind consists in its affirmation of the actual existence of its body, and since we understand by perfection the essence itself of the thing, it follows that the mind passes to a greater or less perfection when it is able to affirm of its body, or some part of it, something which involves a greater or less reality than before. When, therefore, I have said that the mind's power of thought is increased or diminished, I have wished to be understood as meaning nothing else than that the mind has formed an idea of its body, or some part of its body, which expresses more or less reality than it had hitherto affirmed of the body. For the value of ideas and the actual power of thought are measured by the value of the object. Finally, I added, which being given, the mind itself is determined to one particular thought rather than to another, that I might also express the nature of desire in addition to that of joy and sorrow, which is explained by the first part of the definition.
I have now, I think, explained the principal emotions and vacillations of the mind which are compounded of the three primary emotions, desire, joy, and sorrow, and have set them forth through their first causes. From what has been said it is plain that we are disturbed by external causes in a number of ways, and that, like the waves of the sea agitated by contrary winds, we fluctuate in our ignorance of our future and destiny. I have said, however, that I have only explained the principal mental complications, and not all which may exist. For by the same method which we have pursued above it would be easy to show that love unites itself to repentance, scorn, shame, etc.; but I think it has already been made clear to all that the emotions can be combined in so many ways, and that so many variations can arise, that no limits can be assigned to their number. It is sufficient for my purpose to have enumerated only those which are of consequence; the rest, of which I have taken no notice, being more curious than important.
There is one constantly recurring characteristic of love which I have yet to notice, and that is, that while we are enjoying the thing which we desired, the body acquires from that fruition a new disposition by which it is otherwise determined, and the images of other things are excited in it, and the mind begins to imagine and to desire other things. For example, when we imagine anything which usually delights our taste, we desire to enjoy it by eating it. But whilst we enjoy it the stomach becomes full, and the constitution of the body becomes altered. If, therefore, the body being now otherwise disposed, the image of the food, in consequence of its being present, and therefore also the effort or desire to eat it, become more intense, then this new disposition of the body will oppose this effort or desire, and consequently the presence of the food which we desired will become hateful to us, and this hatefulness is what we call loathing or disgust.
As for the external modifications of the body which are observed in the emotions, such as trembling, paleness, sobbing, laughter, and the like, I have neglected to notice them, because they belong to the body alone without any relationship to the mind.
FOOTNOTES:
[26] Hence it follows that the mind is subject to passions in proportion to the number of inadequate ideas which it has, and that it acts in proportion to the number of adequate ideas which it has.