T 3.3.6.1

THUS upon the whole I am hopeful, that nothing is wanting to an accurate proof of this system of ethics. We are certain, that sympathy is a very powerful principle in human nature. We are also certain, that it has a great influence on our sense of beauty, when we regard external objects, as well as when we judge of morals. We find, that it has force sufficient to give us the strongest sentiments of approbation, when it operates alone, without the concurrence of any other principle; as in the cases of justice, allegiance, chastity, and good-manners. We may observe, that all the circumstances requisite for its operation are found in most of the virtues; which have, for the most part, a tendency to the good of society, or to that of the person possess'd of them. If we compare all these circumstances, we shall not doubt, that sympathy is the chief source of moral distinctions; especially when we reflect, that no objection can be rais'd against this hypothesis in one case, which will not extend to all cases. Justice is certainly approv'd of for no other reason, than because it has a tendency to the public good: And the public good is indifferent to us, except so far as sympathy interests us in it. We may presume the like with regard to all the other virtues, which have a like tendency to the public good. They must derive all their merit from our sympathy with those, who reap any advantage from them: As the virtues, which have a tendency to the good of the person possess'd of them, derive their merit from our sympathy with him.