Theory of Moral Sentiments

It was observed in the third part of this discourse, that the rules of justice are the only rules of morality which are precise and accurate; that those of all the other virtues are loose, vague, and indeterminate; that the first may be compared to the rules of grammar; the others to those which critics lay down for the attainment of what is sublime and elegant in composition, and which present us rather with a general idea of the perfection we ought to aim at, than afford us any certain and infallible directions for acquiring it.

As the different rules of morality admit such different degrees of accuracy, those authors who have endeavored to collect and digest them into systems have done it in two different manners; and one set has followed through the whole that loose method to which they were naturally directed by the consideration of one species of virtues; while another has as universally endeavored to introduce into their precepts that sort of accuracy of which only some of them are susceptible. The first have wrote like critics, the second like grammarians.

I. The first, among whom we may count all the ancient moralists, have contented themselves with describing in a general manner the different vices and virtues, and with pointing out the deformity and misery of the one disposition as well as the propriety and happiness of the other, but have not affected to lay down many precise rules that are to hold good unexceptionably in all particular cases. They have only endeavored to ascertain, as far as language is capable of ascertaining, first, wherein consists the sentiment of the heart, upon which each particular virtue is founded, what sort of internal feeling or emotion it is which constitutes the essence of friendship, of humanity, of generosity, of justice, of magnanimity, and of all the other virtues, as well as of the vices which are opposed to them: and, secondly, what is the general way of acting, the ordinary tone and tenor of conduct to which each of those sentiments would direct us, or how it is that a friendly, a generous, a brave, a just, and a humane man, would, upon ordinary occasions, choose to act.

To characterize the sentiment of the heart, upon which each particular virtue is founded, though it requires both a delicate and an accurate pencil, is a task, however, which may be executed with some degree of exactness. It is impossible, indeed, to express all the variations which each sentiment either does or ought to undergo, according to every possible variation of circumstances. They are endless, and language wants names to mark them by. The sentiment of friendship, for example, which we feel for an old man is different from that which we feel for a young: that which we entertain for an austere man different from that which we feel for one of softer and gentler manners: and that again from what we feel for one of gay vivacity and spirit. The friendship which we conceive for a man is different from that with which a woman affects us, even where there is no mixture of any grosser passion. What author could enumerate and ascertain these and all the other infinite varieties which this sentiment is capable of undergoing? But still the general sentiment of friendship and familiar attachment which is common to them all, may be ascertained with a sufficient degree of accuracy. The picture which is drawn of it, though it will always be in many respects incomplete, may, however, have such a resemblance as to make us know the original when we meet with it, and even distinguish it from other sentiments to which it has a considerable resemblance, such as good-will, respect, esteem, admiration.

To describe, in a general manner, what is the ordinary way of acting to which each virtue would prompt us, is still more easy. It is, indeed, scarce possible to describe the internal sentiment or emotion upon which it is founded, without doing something of this kind. It is impossible by language to express, if I may say so, the invisible features of all the