If the virtues of those who are celebrated in history may serve us for models in the conduct of our lives; their vices and failings, on the other hand, are no less proper to caution and instruct us; and the strict regard which an historian is obliged to pay to truth will not allow him to dissemble the latter, through fear of eclipsing the lustre of the former. Nor does what I here advance contradict the rule laid down by Plutarch, on the same subject, in his preface to the life of _Cimon_.(223) He requires, that the illustrious actions of great men be represented in their full light; but as to the faults, which may sometimes escape them through passion or surprise, or into which they may be drawn by the necessity of affairs, considering them rather as a certain degree of perfection wanting to their virtue,(224) than as vices or crimes that proceed from any corruption of the heart; such imperfections as these, he would have the historian, out of compassion to the weakness of human nature, which produces nothing entirely perfect, content himself with touching very lightly; in the same manner as an able painter, when he has a fine face to draw, in which he finds some little blemish or defect, does neither entirely suppress it, nor think himself obliged to represent it with a strict exactness, because the one would spoil the beauty of the picture, and the other would destroy the likeness. The very comparison Plutarch uses, shows, that he speaks only of slight and excusable faults. But as to actions of injustice, violence, and brutality, they ought not to be concealed or disguised on any pretence; nor can we suppose, that the same privilege should be allowed in history as is in painting, which invented the profile, to represent the side-face of a prince who had lost an eye, and by that means ingeniously concealed so disagreeable a deformity.(225) History, the most essential rule of which is sincerity, will by no means admit of such indulgences, as indeed would deprive it of its greatest advantage. Shame, reproach, infamy, hatred, and the execrations of the public, which are the inseparable attendants on criminal and brutal actions, are no less proper to excite a horror for vice, than the glory, which perpetually attends good actions, is to inspire us with the love of virtue. And these, according to Tacitus, are the two ends which every historian ought to propose to himself, by making a judicious choice of what is most extraordinary both in good and evil, in order to occasion that public homage to be paid to virtue, which is justly due to it, and to create the greater abhorrence for vice, on account of that eternal infamy that attends it.(226)