We examine the second question, when we consider, whether the virtuous character, whatever it consists in, be recommended to us by self-love, which makes us perceive that this character, both in ourselves and others, tends most to promote our own private interest or by reason, which points out to us the difference between one character and another, in the same manner as it does that between truth and falsehood; or by a peculiar power of perception, called a moral sense, which this virtuous character gratifies and pleases, as the contrary disgusts and displeases it; or last of all, by some other principle in human nature, such as a modification of sympathy, or the like. I shall begin with considering the systems which have been formed concerning the first of these questions, and shall proceed afterwards to examine those concerning the second. [Illustration] SECTION II. Of the different accounts which have been given of the nature of virtue. INTRODUCTION. The different accounts which have been given of the nature of virtue, or of the temper of mind which constitutes the excellent and praise-worthy character, may be reduced to three different classes. According to some, the virtuous temper of mind does not consist in any one species of affections, but in the proper government and direction of all our affections, which may be either virtuous or vicious according to the objects which they pursue, and the degree of vehemence with which they pursue them. According to these authors, therefore, virtue consists in propriety. According to others, virtue consists in the judicious pursuit of our own private interest and happiness, or in the proper government and direction of those selfish affections which aim solely at this end. In the opinion of these authors, therefore, virtue consists in prudence. Another set of authors make virtue consist in those affections only which aim at the happiness of others, not in those which aim at our own. According to them, therefore, disinterested benevolence is the only motive which can stamp upon any action the character of virtue.