Having explained the moral approbation attending merit or virtue, there remains nothing but briefly to consider our interested obligation to it, and to inquire whether every man, who has any regard to his own happiness and welfare, will not best find his account in the practice of every moral duty. [W]hat theory of morals can ever serve any useful purpose, unless it can show, by a particular detail, that all the duties which it recommends, are also the true interest of (...) each individual? (shrink)