How selfish soever man may be supposed, there are evidently some principles in his nature, which interest him in the fortune of others, and render their happiness necessary to him, though he derives nothing from it except the pleasure of seeing it. Of this kind is pity or compassion, the emotion which we feel for the misery of others, when we either see it, or are made to conceive it in a very lively manner. That we often derive sorrow from the sorrow of others, is a matter of fact too obvious to require any instances to prove it; for this sentiment, like all the other original passions of human nature, is by no means confined to the virtuous and humane, though they perhaps may feel it with the most exquisite sensibility. The greatest ruffian, the most hardened violator of the laws of society, is not altogether without it.

As we have no immediate experience of what other men feel, we can form no idea of the manner in which they are affected, but by conceiving what we ourselves should feel in the like situation. Though our brother is upon the rack, as long as we ourselves are at our ease, our senses will never inform us of what he suffers. They never did, and never can, carry us beyond our own person, and it is by the imagination only that we can form any conception of what are his sensations. Neither can that faculty help us to this any other way, than by representing to us what would be our own, if we were in his case. It is the impressions of our own senses only, not those of his, which our imaginations copy. By the imagination we place ourselves in his situation, we conceive ourselves enduring all the same torments, we enter as it were into his body, and become in some measure the same person with him, and thence form some idea of his sensations, and even feel something which, though weaker in degree, is not altogether unlike them. His agonies, when they are thus brought home to ourselves, when we have thus adopted and made them our own, begin at last to affect us, and we then tremble and shudder at the thought of what he feels. For as to be in pain or distress of any kind excites the most excessive sorrow, so to conceive or to imagine that we are in it, excites some degree of the same emotion, 3in proportion to the vivacity or dullness of the conception.
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That the tendency of virtue to promote, and of vice to disturb the order of society, when we consider it coolly and philosophically, reflects a very great beauty upon the one, and a very great deformity upon the other, cannot, as I have observed upon a former occasion, be called in question. Human society, when we contemplate it in a certain abstract and philosophical light, appears like a great, an immense machine, whose regular and harmonious movements produce a thousand agreeable effects. As in any other beautiful and noble machine that was the production of human art, whatever tended to render its movements more smooth and easy, would derive a beauty from this effect, and, on the contrary, whatever tended to obstruct them would displease upon that account: so virtue, which is, as it were, the fine polish to the wheels of society, necessarily pleases; while vice, like the vile rust, which makes them jar and grate upon one another, is as necessarily offensive. This account, therefore, of the origin of approbation and disapprobation, so far as it derives them from a regard to the order of society, runs into that principle which gives beauty to utility, and which I have explained upon a former occasion; and it is from thence that this system derives all that appearance of probability which it possesses. When those authors describe the innumerable advantages of a cultivated and social, above a savage and solitary life; when they expatiate upon the necessity of virtue and good order for the maintenance of the one, and demonstrate how infallibly the prevalence of vice and disobedience to the laws tend to bring back the other, the reader is charmed with the novelty and grandeur of those views which they open to him: he sees plainly a new beauty in virtue, and a new deformity in vice, which he had never taken notice of before, and is commonly so delighted with the discovery, that he seldom takes time to reflect, that this political view, having never occurred to him in his life before, cannot possibly be the ground of that approbation and disapprobation with which he has always been accustomed to consider those different qualities.

When those authors, on the other hand, deduce from self-love the interest which we take in the welfare of society, and the esteem which upon that account we bestow upon virtue, they do not mean, that when we in this age applaud the virtue of Cato, and detest the villainy of Catiline, our sentiments are influenced by the notion of any benefit we receive from the one, or of any detriment we suffer from the other. It was not because the prosperity or subversion of society, in those remote ages and nations, was apprehended to have any influence upon our happiness or misery in the present times; that according to those philosophers, we esteemed the virtuous, 349and blamed the disorderly character. They never imagined that our sentiments were influenced by any benefit or damage which we supposed actually to redound to us, from either; but by that which might have redounded to us, had we lived in those distant ages and countries; or by that which might still redound to us, if in our own times we should meet with characters of the same kind. The idea, in short, which those authors were groping about, but which they were never able to unfold distinctly, was that indirect sympathy which we feel with the gratitude or resentment of those who received the benefit or suffered the damage resulting from such opposite characters: and it was this which they were indistinctly pointing at, when they said, that it was not the thought of what we had gained or suffered which prompted our applause or indignation, but the conception or imagination of what we might gain or suffer if we were to act in society with such associates.

Sympathy, however, cannot, in any sense, be regarded as a selfish principle. When I sympathize with your sorrow or your indignation, it may be pretended, indeed, that my emotion is founded in self-love, because it arises from bringing your case home to myself, from putting myself in your situation, and thence conceiving what I should feel in the like circumstances. But though sympathy is very properly said to arise from an imaginary change of situations with the person principally concerned, yet this imaginary change is not supposed to happen to me in my own person and character, but in that of the person with whom I sympathize. When I condole with you for the loss of your only son, in order to enter into your grief, I do not consider what I, a 350person of such a character and profession, should suffer, if I had a son, and if that son was unfortunately to die: but I consider what I should suffer if I was really you, and I not only change circumstances with you, but I change persons and characters. My grief, therefore, is entirely upon your account, and not in the least upon my own. It is not, therefore, in the least selfish. How can that be regarded as a selfish passion, which does not arise even from the imagination of any thing that has befallen, or that relates to myself, in my own proper person and character, but which is entirely occupied about what relates to you? A man may sympathize with a woman in child-bed; though it is impossible that he should conceive himself as suffering her pains in his own proper person and character. That whole account of human nature, however, which deduces all sentiments and affections from self-love, which has made so much noise in the world, but which, so far as I know, has never yet been fully and distinctly explained, seems to me to have arisen from some confused misapprehension of the system of sympathy.