Such is the system of Dr. Mandeville, which once made so much noise in the world, and which, though, perhaps, it never gave occasion to more vice than what would have been without it, at least taught that vice, which arose from other causes, to appear with more effrontery, and to avow the corruption of its motives with a profligate audaciousness which had never been heard of before.
But how destructive soever this system may appear, it could never have imposed upon so great a number of persons, nor have occasioned so general an alarm among those who are the friends of better principles, had it not in some respects bordered upon the truth. A system of natural philosophy may appear very plausible, and be for a long time very generally received in the world, and yet have no foundation in nature, nor any sort of resemblance to the truth. The vortices of Descartes were regarded by a very ingenious nation, for near a century together, as a most satisfactory account of the revolutions of the heavenly bodies. Yet it has been demonstrated, to the conviction of all mankind, that these pretended causes of those wonderful effects, not only do not actually exist, but are utterly impossible, and if they did exist, could produce no such effects as are ascribed to them. But it is otherwise with systems of moral philosophy, and an author who pretends to account for the origin of our moral sentiments, cannot deceive us so grossly, nor depart so very far from all resemblance to the truth. When a traveller gives an account of some distant country, he may impose upon our credulity, the most groundless and absurd fictions as the most certain matters of fact. But when a person pretends to inform us of what passes in our neighbourhood, and of the affairs of the very parish which we live in, though here too, if we are so careless as not to examine things with our own eyes, he may deceive us in many respects, yet the greatest falsehoods which he imposes upon us must bear some resemblance to the truth, and must even have a considerable mixture of truth in them. An author who treats of natural philosophy, and pretends to assign the causes of the great phenomena of the universe, pretends to give an account of the affairs of a very distant country, concerning which he may tell us what he pleases, and as long as his narration keeps within the bounds of seeming possibility, he need not despair of gaining of belief. But when he proposes to explain the origin of our desires and affections, of our sentiments of approbation and disapprobation, he pretends to give an account, not only of the affairs of the very parish that we live in, but of our own domestic concerns. Though here too, like indolent masters who put their trust in a steward who deceives them, we are very liable to be imposed upon, yet we are incapable of passing any account which does not preserve some little regard to the truth. Some of the articles, at least, must be just, and even those which are most overcharged must have had some foundation, otherwise the fraud would be detected even by that careless inspection which we are disposed to give. The author who should assign, as the cause of any natural sentiment, some principle which neither had any connection with it, nor resembled any other principle which had some such connection, would appear absurd and ridiculous to the most injudicious and unexperienced reader.
Section III
Of the Different Systems Which Have Been Formed Concerning the Principle of Approbation
Introduction
After the inquiry concerning the nature of virtue, the next question of importance in Moral Philosophy, is concerning the principle of approbation, concerning the power or faculty of the mind which renders certain characters agreeable or disagreeable to us, makes us prefer one tenor of conduct to another, denominate the one right and the other wrong, and consider the one as the object of approbation, honour, and reward, or the other as that of blame, censure, and punishment.
Three different accounts have been given of this principle of approbation. According to some, we approve and disapprove both of our own actions and of those of others, from self-love only, or from some view of their tendency to our own happiness or disadvantage: according to others, reason, the same faculty by which we distinguish between truth and falsehood, enables us to distinguish between what is fit and unfit both in actions and affections: according to others, this distinction is altogether the effect of immediate sentiment and feeling, and arises from the satisfaction or disgust with which the view of certain actions or affections inspires us. Self-love, reason and sentiment, therefore, are the three different sources which have been assigned for the principle of approbation.
Before I proceed to give an account of those different systems, I must observe, that the determination of this second question, though of the greatest importance in speculation, is of none in practice. The question concerning the nature of virtue necessarily has some influence upon our notions of right and wrong in many particular cases. That concerning the principle
