CHAPTER XII. The Origin and Nature of the Emotions

THE ORIGIN AND NATURE OF THE EMOTIONS

Introductory

Most persons who have written about the emotions and man's conduct of life seem to discuss, not the natural things which follow the common laws of Nature, but things which are outside her. They seem indeed to consider man in Nature as a kingdom within a kingdom. For they believe that man disturbs rather than follows her order; that he has an absolute power over his own actions; and that he is altogether self-determined. They then proceed to attribute the cause of human weakness and changeableness, not to the common power of Nature, but to some vice of human nature, which they therefore bewail, laugh at, mock, or, as is more generally the case, detest; whilst he who knows how to revile most eloquently or subtilely the weakness of the mind is looked upon as divine.

It is true that very eminent men have not been wanting, to whose labor and industry we confess ourselves much indebted, who have written many excellent things about the right conduct of life, and who have given to mortals counsels full of prudence. But no one so far as I know has determined the nature and strength of the emotions, and what the mind is able to do towards controlling them. I remember, indeed, that the celebrated Descartes, although he believed that the mind is absolute master over its own actions, tried nevertheless to explain by their first causes human emotions, and at the same time to show the way by which the mind could obtain absolute power over them. But in my opinion he has shown nothing but the acuteness of his great intellect, as I shall make evident in the proper place, for I wish to return to those who prefer to detest and scoff at human affects and actions than understand them.

To such as these it will doubtless seem a marvelous thing for me to endeavor to treat by a geometrical method the vices and follies of men, and to desire by a sure method to demonstrate those things which these people cry out against as being opposed to reason, or as being vanities, absurdities, and monstrosities. The following is my reason for so doing. Nothing happens in Nature which can be attributed to any vice of Nature, for she is always the same and everywhere one. Her virtue is the same, and her power of acting; that is to say, her laws and rules, according to which all things are and are changed from form to form, are everywhere and always the same; so that there must also be one and the same method of understanding the nature of all things whatsoever, that is to say, by the universal laws and rules of Nature. The emotions, therefore, of hatred, anger, envy, considered in themselves, follow from the same necessity and virtue of Nature as other individual things; they have therefore certain causes through which they are to be understood, and certain properties which are just as worthy of being known as the properties of any other thing in the contemplation alone of which we delight. I shall, therefore, pursue the same method in considering the nature and strength of the emotions and the power of the mind over them which I pursued in our previous discussion of God and the mind, and I shall consider human actions and appetites just as if I were considering lines, planes or bodies.

Definitions

I.--I call that an adequate cause whose effect can be clearly and distinctly perceived by means of the cause. I call that an inadequate or partial cause whose effect cannot be understood by means of the cause alone.

II.--I say that we act when anything is done, either within us or without us, of which we are the adequate cause, that is to say (by the preceding Definition), when from our nature anything follows, either within us or without us, which by that nature alone can be clearly and distinctly understood. On the other hand, I say that we suffer when anything is done within us, or when anything follows from our nature, of which we are not the cause excepting partially.

III.--By emotion I understand the modifications of the body, by which the power of acting of the body itself is increased, diminished, helped, or hindered, together with the ideas of these modifications.

If, therefore, we can be the adequate cause of any of these modifications, I understand the emotion to be an action, otherwise it is a passion.

Postulates

1.--The human body can be affected in many ways by which its power of acting is increased or diminished, and also in other ways which make its power of acting neither greater nor less.

2.--The human body is capable of suffering many changes, and, nevertheless, can retain the impressions or traces of objects, and consequently the same images of things.

The Two States of Mind: Active and Passive

In every human mind some ideas are adequate, and others mutilated and confused. But the ideas which in any mind are adequate are adequate in God in so far as He forms the essence of that mind, while those again which are inadequate in the mind are also adequate in God, not in so far as He contains the essence of that mind only, but in so far as He contains the ideas of other things at the same time in Himself. Again, from any given idea some effect must necessarily follow, of which God is the adequate cause, not in so far as He is infinite, but in so far as He is considered as affected with the given idea. But of that effect of which God is the cause, in so far as He is affected by an idea which is adequate in any mind, that same mind is the adequate cause. Our mind, therefore, in so far as it has adequate ideas, necessarily at times acts. Again, if there be anything which necessarily follows from an idea which is adequate in God, not in so far as He contains within Himself the mind of one man only, but also, together with this, the ideas of other things, then the mind of that man is not the adequate cause of that thing, but is only its partial cause, and therefore, in so far as the mind has inadequate ideas, it necessarily at times suffers.

The Basic Endeavor of All Things

Individual things are modes by which the attributes of God are expressed in a certain and determinate manner; that is to say, they are things which express in a certain and determinate manner the power of God, by which He is and acts. A thing, too, has nothing in itself through which it can be destroyed, or which can negate its existence, but, on the contrary, it is opposed to everything which could negate its existence. Therefore, in so far as it can and is in itself, it endeavors to persevere in its own being.

The Three Primary Emotions

Desire

The essence of the mind is composed of adequate and inadequate ideas (as we have shown), and therefore both in so far as it has the former and in so far as it has the latter, it endeavors to persevere in its being, and endeavors to persevere in it for an indefinite time. But since the mind, through the ideas of the modifications of the body, is necessarily conscious of itself, it is therefore conscious of its effort.

This effort, when it is related to the mind alone, is called will, but when it is related at the same time both to the mind and the body, is called appetite, which is therefore nothing but the very essence of man, from the nature of which necessarily follow those things which promote his preservation, and thus he is determined to do those things. Hence there is no difference between appetite and desire, unless in this particular, that desire is generally related to men in so far as they are conscious of their appetites, and it may therefore be defined as appetite of which we are conscious. From what has been said it is plain, therefore, that we neither strive for, wish, seek, nor desire anything because we think it to be good, but, on the contrary, we adjudge a thing to be good because we strive for, wish, seek, or desire it.

Joy and Sorrow

If anything increases, diminishes, helps, or limits our body's power of action, the idea of that thing increases, diminishes, helps, or limits our mind's power of thought.

We thus see that the mind can suffer great changes, and can pass now to a greater and now to a lesser perfection; these passions explaining to us the emotions of joy and sorrow. By joy, therefore, in what follows, I shall understand the passion by which the mind passes to a greater perfection; by sorrow, on the other hand, the passion by which it passes to a less perfection. The emotion of joy, related at the same time both to the mind and the body, I call pleasurable excitement (titillatio) or cheerfulness; that of sorrow I call pain or melancholy. It is, however, to be observed that pleasurable excitement and pain are related to a man when one of his parts is affected more than the others; cheerfulness and melancholy, on the other hand, when all parts are equally affected. What the nature of desire is I have explained; and besides these three--joy, sorrow, and desire--I know of no other primary emotion, the others springing from these.

Definitions of the Principal Emotions

I.--Desire is the essence itself of man in so far as it is conceived as determined to any action by any one of his modifications.

Explanation.--We have said above, that desire is appetite which is self-conscious, and that appetite is the essence itself of man in so far as it is determined to such acts as contribute to his preservation. But I have taken care to remark that in truth I cannot recognize any difference between human appetite and desire. For whether a man be conscious of his appetite or not, it remains one and the same appetite, and so, lest I might appear to be guilty of tautology, I have not explained desire by appetite, but have tried to give such a definition of desire as would include all the efforts of human nature to which we give the name of appetite, desire, will, or impulse. For I might have said that desire is the essence itself of man in so far as it is considered as determined to any action; but from this definition it would not follow that the mind could be conscious of its desire or appetite, and therefore, in order that I might include the cause of this consciousness, it was necessary to add the words, in so far as it is conceived as determined to any action by any one of his modifications. For by a modification of the human essence we understand any constitution of that essence, whether it be innate, whether it be conceived through the attribute of thought alone or of extension alone, or whether it be related to both. By the word "desire," therefore, I understand all the efforts, impulses, appetites, and volitions of a man, which vary according to his changing disposition, and not unfrequently are so opposed to one another that he is drawn hither and thither, and knows not whither he ought to turn.

II. Joy is man's passage from a less to a greater perfection.

III. Sorrow is man's passage from a greater to a less perfection.

Explanation.--I say passage, for joy is not perfection itself. If a man were born with the perfection to which he passes, he would possess it without the emotion of joy; a truth which will appear the more clearly from the emotion of sorrow, which is the opposite to joy. For that sorrow consists in the passage to a less perfection, but not in the less perfection itself, no one can deny, since in so far as a man shares any perfection he cannot be sad. Nor can we say that sorrow consists in the privation of a greater perfection for privation is nothing. But the emotion of sorrow is a reality, and it therefore must be the reality of the passage to a lesser perfection, or the reality by which man's power of acting is diminished or limited. As for the definitions of cheerfulness, pleasurable excitement, melancholy, and grief, I pass these by, because they are related rather to the body than to the mind, and are merely different kinds of joy or of sorrow.

IV. Astonishment is the imagination of an object in which the mind remains fixed because this particular imagination has no connection with others.

Explanation.--That which causes the mind from the contemplation of one thing immediately to pass to the thought of another is that the images of these things are connected one with the other, and are so arranged that the one follows the other; a process which cannot be conceived when the image of the thing is new, for the mind will be held in the contemplation of the same object until other causes determine it to think of other things. The imagination, therefore, considered in itself, of a new object is of the same character as other imaginations; and for this reason I do not class astonishment among the emotions, nor do I see any reason why I should do it, since this abstraction of the mind arises from no positive cause by which it is abstracted from other things, but merely from the absence of any cause by which from the contemplation of one thing the mind is determined to think other things. I acknowledge, therefore, only three primitive or primary emotions, those of joy, sorrow, and desire; and the only reason which has induced me to speak of astonishment is, that it has been the custom to give other names to certain emotions derived from the three primitives whenever these emotions are related to objects at which we are astonished. This same reason also induces me to add the definition of contempt.

V. Contempt is the imagination of an object which so little touches the mind that the mind is moved by the presence of the object to imagine those qualities which are not in it rather than those which are in it.

The definitions of veneration and scorn I pass by here, because they give a name, so far as I know, to none of the emotions.

VI. Love is joy with the accompanying idea of an external cause.

Explanation.--This definition explains with sufficient clearness the essence of love; that which is given by some authors, who define love to be the will of the lover to unite himself to the beloved object, expresses not the essence of love but one of its properties. In as much as these authors have not seen with sufficient clearness what is the essence of love, they could not have a distinct conception of its properties, and consequently their definition has by everybody been thought very obscure. I must observe, however, when I say that it is a property in a lover to will a union with the beloved object, that I do not understand by will a consent or deliberation or a free decree of the mind (for that this is a fiction we have demonstrated above), nor even a desire of the lover to unite himself with the beloved object when it is absent, nor a desire to continue in its presence when it is present, for love can be conceived without either one or the other of these desires; but by will I understand the satisfaction that the beloved object produces in the lover by its presence, by virtue of which the joy of the lover is strengthened, or at any rate supported.

VII. Hatred is sorrow with the accompanying idea of an external cause.

Explanation.--What is to be observed here will easily be seen from what has been said in the explanation of the preceding definition.

VIII. Inclination (propensio) is a joy with the accompanying idea of some object as being accidentally the cause of joy.

IX. Aversion is sorrow with the accompanying idea of some object which is accidentally the cause of the sorrow.

X. Devotion is love towards an object which astonishes us.

Explanation.--Astonishment arises from the novelty of the object. If, therefore, it should happen that we often imagine the object at which we are astonished, we shall cease to be astonished at it, and hence we see that the emotion of devotion easily degenerates into simple love.

XI. Derision is joy arising from the imagination that something we despise is present in an object we hate.

Explanation.--In so far as we despise a thing we hate do we deny its existence, and so far do we rejoice. But inasmuch as we suppose that a man hates what he ridicules, it follows that this joy is not solid.

XII. Hope is a joy not constant, arising from the idea of something future or past, about the issue of which we sometimes doubt.

XIII. Fear is a sorrow not constant, arising from the idea of something future or past, about the issue of which we sometimes doubt.

Explanation.--From these definitions it follows that there is no hope without fear nor fear without hope, for the person who wavers in hope and doubts concerning the issue of anything is supposed to imagine something which may exclude its existence, and so far, therefore, to be sad, and consequently while he wavers in hope, to fear lest his wishes should not be accomplished. So also the person who fears, that is to say, who doubts whether what he hates will not come to pass, imagines something which excludes the existence of what he hates, and therefore is rejoiced, and consequently so far hopes that it will not happen.

XIV. Confidence is joy arising from the idea of a past or future object from which cause for doubting is removed.

XV. Despair is sorrow arising from the idea of a past or future object from which cause for doubting is removed.

Explanation.--Confidence, therefore, springs from hope and despair from fear, whenever the reason for doubting the issue is taken away; a case which occurs either because we imagine a thing past or future to be present and contemplate it as present, or because we imagine other things which exclude the existence of those which made us to doubt.

For although we can never be sure about the issue of individual objects, it may nevertheless happen that we do not doubt it. For elsewhere we have shown that it is one thing not to doubt and another to possess certitude, and so it may happen that from the image of an object either past or future we are affected with the same emotion of joy or sorrow as that by which we should be affected from the image of an object present.

XVI. Gladness (gaudium) is a joy with the accompanying idea of something past, which, unhoped for, has happened.

XVII. Remorse is sorrow with the accompanying idea of something past, which, unhoped for, has happened.

XVIII. Commiseration is sorrow with the accompanying idea of evil which has happened to some one whom we imagine like ourselves.

Explanation.--Between commiseration and compassion there seems to be no difference, excepting perhaps that commiseration refers rather to an individual emotion and compassion to it as a habit.

XIX. Favor is love towards those who have benefited others.

XX. Indignation is hatred towards those who have injured others.

Explanation.--I am aware that these names in common bear a different meaning. But my object is not to explain the meaning of words but the nature of things, and to indicate them by words whose customary meaning shall not be altogether opposed to the meaning which I desire to bestow upon them. I consider it sufficient to have said this once for all.

XXI. Over-estimation consists in thinking too highly of another person in consequence of our love for him.

XXII. Contempt consists in thinking too little of another person in consequence of our hatred for him.

Explanation.--Over-estimation and contempt are therefore respectively effects or properties of love or hatred, and so over-estimation may be defined as love in so far as it affects a man so that he thinks too much of the beloved object; and, on the contrary, contempt may be defined as hatred in so far as it affects a man so that he thinks too little of the object he hates.

XXIII. Envy is hatred in so far as it affects a man so that he is sad at the good fortune of another person and is glad when any evil happens to him.

Explanation.--To envy is generally opposed compassion (misericordia), which may therefore be defined as follows, notwithstanding the usual signification of the word:--

XXIV. Compassion is love in so far as it affects a man so that he is glad at the prosperity of another person and is sad when any evil happens to him.

I pass now to consider other emotions which are attended by the idea of something within us as the cause.

XXV. Self-satisfaction is the joy which is produced by contemplating ourselves and our own power of action.

XXVI. Humility is the sorrow which is produced by contemplating our impotence or helplessness.

Self-satisfaction is opposed to humility in so far as we understand by the former the joy which arises from contemplating our power of action, but in so far as we understand by it joy attended with the idea of something done, which we believe has been done by a free decree of our mind, it is opposed to repentance, which we may thus define:--

XXVII. Repentance is sorrow accompanied with the idea of something done which we believe has been done by a free decree of our mind.

It is not to be wondered at that sorrow should always follow all those actions which are from custom called wicked, and that joy should follow those which are called good. But that this is chiefly the effect of education will be evident from what we have before said. Parents, by reprobating what are called bad actions, and frequently blaming their children whenever they commit them, while they persuade them to what are called good actions, and praise their children when they perform them, have caused the emotions of sorrow to connect themselves with the former, and those of joy with the latter. Experience proves this, for custom and religion are not the same everywhere; but, on the contrary, things which are sacred to some are profane to others, and what are honorable with some are disgraceful with others. Education alone, therefore, will determine whether a man will repent of any deed or boast of it.

XXVIII. Pride is thinking too much of ourselves, through self-love.

Explanation.--Pride differs, therefore, from over-estimation, inasmuch as the latter is related to an external object, but pride to the man himself who thinks of himself too highly. As over-estimation, therefore, is an effect or property of love, so pride is an effect or property of self-love, and it may therefore be defined as love of ourselves or self-satisfaction, in so far as it affects us so that we think too highly of ourselves.

To this emotion a contrary does not exist, for no one, through hatred of himself, thinks too little of himself; indeed, we may say that no one thinks too little of himself, in so far as he imagines himself unable to do this or that thing. For whatever he imagines that he cannot do, that thing he necessarily imagines, and by his imagination is so disposed that he is actually incapable of doing what he imagines he cannot do. So long, therefore, as he imagines himself unable to do this or that thing, so long is he not determined to do it, and consequently so long it is impossible for him to do it. If, however, we pay attention to what depends upon opinion alone, we shall be able to conceive it possible for a man to think too little of himself, for it may happen that while he sorrowfully contemplates his own weakness he will imagine himself despised by everybody, although nothing could be further from their thoughts than to despise him. A man may also think too little of himself if in the present he denies something of himself in relation to a future time of which he is not sure; for example, when he denies that he can conceive of nothing with certitude, and that he can desire and do nothing which is not wicked and base. We may also say that a man thinks too little of himself when we see that, from an excess of fear or shame, he does not dare to do what others who are his equals dare to do. This emotion, to which I will give the name of despondency, may therefore be opposed to pride; for as self-satisfaction springs from pride, so despondency springs from humility, and it may therefore be defined thus:

XXIX. Despondency is thinking too little of ourselves through sorrow.

Explanation.--We are, nevertheless, often in the habit of opposing humility to pride, but only when we attend to their effects rather than to their nature. For we are accustomed to call a man proud who boasts too much, who talks about nothing but his own virtues and other people's vices, who wishes to be preferred to everybody else, and who marches along with that stateliness and pomp which belong to others whose position is far above his. On the other hand, we call a man humble who often blushes, who confesses his own faults and talks about the virtues of others, who yields to every one, who walks with bended head, and who neglects to adorn himself. These emotions, humility and despondency, are very rare, for human nature, considered in itself, struggles against them as much as it can, and hence those who have the most credit for being abject and humble are generally the most ambitious and envious.

XXX. Self-exaltation is joy with the accompanying idea of some action we have done, which we imagine people praise.

XXXI. Shame is sorrow, with the accompanying idea of some action which we imagine people blame.

Explanation.--A difference, however, is here to be observed between shame and modesty. Shame is sorrow which follows a deed of which we are ashamed. Modesty is the dread or fear of shame, which keeps a man from committing any disgraceful act. To modesty is usually opposed impudence, which indeed is not an emotion, as I shall show in the proper place; but the names of emotions, as I have already said, are matters rather of custom than indications of the nature of the emotions. I have thus discharged the task which I set myself of explaining the emotions of joy and sorrow. I will advance now to those which I ascribe to desire.

XXXII. Regret is the desire or longing to possess something, the emotion being strengthened by the memory of the object itself, and at the same time being restrained by the memory of other things which exclude the existence of the desired object.

Explanation.--Whenever we recollect a thing, as we have often said, we are thereby necessarily disposed to contemplate it with the same emotion as if it were present before us. But this disposition or effort, while we are awake, is generally restrained by the images of things which exclude the existence of the thing which we recollect. Whenever, therefore, we recollect a thing which affects us with any kind of joy, we thereby endeavor to contemplate it with the same emotion of joy as if it were present,--an attempt which is, however, immediately restrained by the memory of that which excludes the existence of the thing. Regret, therefore, is really a sorrow which is opposed to the joy which arises from the absence of what we hate. But because the name regret seems to connect this emotion with desire, I therefore ascribe it to desire.

XXXIII. Emulation is the desire which is begotten in us of a thing because we imagine that other persons have the same desire.

Explanation.--He who seeks flight because others seek it, he who fears because he sees others fear, or even he who withdraws his hand and moves his body as if his hand were burning because he sees that another person has burnt his hand, such as these, I say, although they may indeed imitate the emotion of another, are not said to emulate it; not because we have recognized one cause for emulation and another for imitation, but because it has been the custom to call that man only emulous who imitates what we think noble, useful, or pleasant.

XXXIV. Thankfulness or gratitude is the desire or endeavor of love with which we strive to do good to others who, from a similar emotion of love, have done good to us.

XXXV. Benevolence is the desire to do good to those whom we pity.

XXXVI. Anger is the desire by which we are impelled, through hatred, to injure those whom we hate.

XXXVII. Vengeance is the desire which, springing from mutual hatred, urges us to injure those who, from a similar emotion, have injured us.

XXXVIII. Cruelty or ferocity is the desire by which a man is impelled to injure any one whom we love or pity.

Explanation.--To cruelty is opposed mercy, which is not a passion, but a power of the mind by which a man restrains anger and vengeance.

XXXIX. Fear is the desire of avoiding the greater of two dreaded evils by the less.

XL. Audacity is the desire by which we are impelled to do something which is accompanied with a danger which our equals fear to meet.

XLI. A person is said to be pusillanimous whose desire is restrained by the fear of a danger which his equals dare to meet.

Explanation.--Pusillanimity, therefore, is nothing but the dread of some evil which most persons do not usually fear, and therefore I do not ascribe it to the emotions of desire. I wished, notwithstanding, to explain it here, because in so far as we attend to desire, pusillanimity is the true opposite of the emotion of audacity.

XLII. Consternation is affirmed of the man whose desire of avoiding evil is restrained by astonishment at the evil which he fears.

Explanation.--Consternation is therefore a kind of pusillanimity. But because consternation springs from a double fear, it may be more aptly defined as that dread which holds a man stupefied or vacillating, so that he cannot remove an evil. I say stupefied, in so far as we understand his desire of removing the evil to be restrained by his astonishment. I say also vacillating, in so far as we conceive the same desire to be restrained by the fear of another evil which equally tortures him, so that he does not know which of the two evils to avoid.

XLIII. Courtesy or moderation is the desire of doing those things which please men and omitting those which displease them.

XLIV. Ambition is the immoderate desire of glory.

Explanation.--Ambition is a desire which increases and strengthens all the emotions, and that is the reason why it can hardly be kept under control. For so long as a man is possessed by any desire, he is necessarily at the same time possessed by this. Every noble man, says Cicero, is led by glory, and even the philosophers who write books about despising glory place their names on the title-page.

XLV. Luxuriousness is the immoderate desire or love of good living.

XLVI. Drunkenness is the immoderate desire and love of drinking.

XLVII. Avarice is the immoderate desire and love of riches.

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:

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.

This proposition is self-evident, for the definition of any given thing affirms and does not deny the existence of the thing; that is to say, it posits the essence of the thing and does not negate it. So long, therefore, as we attend only to the thing itself, and not to external causes, we shall discover nothing in it which can destroy it.