As what gives pleasure or pain, therefore, either in one way or another, is the sole exciting cause of gratitude and resentment; though the intentions of any person should be ever so proper and beneficent, on the one hand, or ever so improper and malevolent on the other; yet, if he has failed in producing either the good or evil which he intended, as one of the exciting causes is wanting in both cases, less gratitude seems due to him in the one, and less resentment in the other. And, on the contrary, though in the intentions of any person, there was either no laudable degree of benevolence on the one hand, or no blamable degree of malice on the other; yet, if his actions should produce either great good or great evil, as one of the exciting causes takes place upon both these occasions, some gratitude is apt to arise towards him in the one, and some resentment in the other. A shadow of merit seems to fall upon him in the first, a shadow of demerit in the second. And, as the consequences of actions are altogether under the empire of Fortune, hence arises her influence upon the sentiments of mankind, with regard to merit and demerit. CHAP. II. _Of the extent of this influence of fortune._ The effect of this influence of fortune is, first, to diminish our sense of the merit or demerit of those actions which arose from the most laudable or blamable intentions, when they fail of producing their proposed effects: and, secondly, to increase our sense of the merit or demerit of actions, beyond what is due to the motives or affections from which they proceed, when they accidentally give occasion either to extraordinary pleasure or pain.