The passions of love and hatred are always followed by, or rather conjoined with, benevolence and anger. 'Tis this conjunction which chiefly distinguishes these affections from pride and humility. For pride and humility are pure emotions in the soul, unattended with any desire, and not immediately exciting us to action. But love and hatred are not completed within themselves, nor rest in that emotion which they produce, but carry the mind to something farther. Love is always followed by a desire of the happiness of the person beloved, and an aversion to his misery: as hatred produces a desire of the misery, and an aversion to the happiness of the person hated. So remarkable a difference betwixt these two sets of passions of pride and humility, love and hatred, which in so many other particulars correspond to each other, merits our attention.
The conjunction of this desire and aversion with love and hatred may be accounted for by two different hypotheses. The first is, that love and hatred have not only a cause which excites them, viz. pleasure and pain, and an object to which they are directed, viz. a person or thinking being, but likewise an end which they endeavour to attain, viz. the happiness or misery of the person beloved or hated; all which views, mixing together, make only one passion. According to this system, love is nothing but the desire of happiness to another person, and hatred that of misery. The desire and aversion constitute the very nature of love and hatred. They are not only inseparable, but the same.
But this is evidently contrary to experience. For though 'tis certain we never love any person without desiring his happiness, nor hate any without wishing his misery, yet these desires arise only upon the ideas of the happiness or misery of our friend or enemy being presented by the imagination, and are not absolutely essential to love and hatred. They are the most obvious and natural sentiments of these affections, but not the only ones. The passions may express themselves in a hundred ways, and may subsist a considerable time, without our reflecting on the happiness or misery of their objects; which clearly proves that these desires are not the same with love and hatred, nor make any essential part of them.
We may therefore infer, that benevolence and anger are passions different from love and hatred, and only conjoined with them by the original constitution of the mind. As nature has given to the body certain appetites and inclinations, which she increases, diminishes, or changes according to the situation of the fluids or solids, she has proceeded in the same manner with the mind. According as we are possessed with love or hatred, the correspondent desire of the happiness or misery of the person who is the object of these passions, arises in the mind, and varies with each variation of these opposite passions. This order of things, abstractedly considered, is not necessary. Love and hatred might have been unattended with any such desires, or their particular connexion might have been entirely reversed. If nature had so pleased, love might have had the same effect as hatred, and hatred as love. I see no contradiction in supposing a desire of producing misery annexed to love, and of happiness to hatred. If the sensation of the passion and desire be opposite, nature could have altered the sensation without altering the tendency of the desire, and by that means made them compatible with each other.
[SECTION VII.]
OF COMPASSION.
But though the desire of the happiness or misery of others, according to the love or hatred we bear them, be an arbitrary and original instinct implanted in our nature, we find it may be counterfeited on many occasions, and may arise from secondary principles. Pity is a concern for, and malice a joy in, the misery of others, without any friendship or enmity to occasion this concern or joy. We pity even strangers, and such as are perfectly indifferent to us: and if our ill-will to another proceed from any harm or injury, it is not, properly speaking, malice, but revenge. But if we examine these affections of pity and malice, we shall find them to be secondary ones, arising from original affections, which are varied by some particular turn of thought and imagination.
'Twill be easy to explain the passion of pity, from the precedent reasoning concerning sympathy. We have a lively idea of every thing related to us. All human creatures are related to us by resemblance. Their persons, therefore, their interests, their passions, their pains and pleasures, must strike upon us in a lively manner, and produce an emotion similar to the original one, since a lively idea is easily converted into an impression. If this be true in general, it must be more so of affliction and sorrow. These have always a stronger and more lasting influence than any pleasure or enjoyment.
A spectator of a tragedy passes through a long train of grief, terror, indignation, and other affections, which the poet represents in the persons he introduces. As many tragedies end happily, and no excellent one can be composed without some reverses of fortune, the spectator must sympathize with all these changes, and receive the fictitious joy as well as every other passion. Unless therefore it be asserted, that every distinct passion is communicated by a distinct original quality, and is not derived from the general principle of sympathy above explained, it must be allowed that all of them arise from that principle. To except any one in particular must appear highly unreasonable. As they are all first present in the mind of one person, and afterwards appear in the mind of another; and as the manner of their appearance, first as an idea, then as an impression, is in every case the same, the transition must arise from the same principle. I am at least sure, that this method of reasoning would be considered as certain, either in natural philosophy or common life.