There have been men indeed splendidly wicked, whose endowments threw a brightness on their crimes, and whom scarce any villany made perfectly detestable, because they never could be wholly divested of their excellencies; but such have been in all ages the great corrupters of the world, and their resemblance ought no more to be preserved, than the art of murdering without pain.
Some have advanced, without due attention to the consequences of this notion, that certain virtues have their correspondent faults, and therefore that to exhibit either apart is to deviate from probability. Thus men are observed by Swift to be "grateful in the same degree as they are resentful." This principle, with others of the same kind, supposes man to act from a brute impulse, and pursue a certain degree of inclination, without any choice of the object; for, otherwise, though it should be allowed that gratitude and resentment arise from the same constitution of the passions, it follows not that they will be equally indulged when reason is consulted; yet, unless that consequence be admitted, this sagacious maxim becomes an empty sound, without any relation to practice or to life.
Nor is it evident, that even the first motions to these effects are always in the same proportion. For pride, which produces quickness of resentment, will obstruct gratitude, by unwillingness to admit that inferiority which obligation implies; and it is very unlikely that he who cannot think he receives a favour, will acknowledge or repay it. It is of the utmost importance to mankind, that positions of this tendency should be laid open and confuted; for while men consider good and evil as springing from the same root, they will spare the one for the sake of the other, and in judging, if not of others at least of themselves, will be apt to estimate their virtues by their vices. To this fatal errour all those will contribute, who confound the colours of right and wrong, and, instead of helping to settle their boundaries, mix them with so much art, that no common mind is able to disunite them.
In narratives where historical veracity has no place, I cannot discover why there should not be exhibited the most perfect idea of virtue; of virtue not angelical, nor above probability, for what we cannot credit, we shall never imitate, but the highest and purest that humanity can reach, which, exercised in such trials as the various revolutions of things shall bring upon it, may, by conquering some calamities, and enduring others, teach us what we may hope, and what we can perform. Vice, for vice is necessary to be shewn, should always disgust; nor should the graces of gaiety, or the dignity of courage, be so united with it, as to reconcile it to the mind. Wherever it appears, it should raise hatred by the malignity of its practices, and contempt by the meanness of its stratagems: for while it is supported by either parts or spirit, it will be seldom heartily abhorred. The Roman tyrant was content to be hated, if he was but feared; and there are thousands of the readers of romances willing to be thought wicked, if they may be allowed to be wits. It is therefore to be steadily inculcated, that virtue is the highest proof of understanding, and the only solid basis of greatness; and that vice is the natural consequence of narrow thoughts; that it begins in mistake, and ends in ignominy[33].