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78 pleasure of converting an enemy into a friend; and he justified the sincerity of that sentiment, by moderating the zeal of the senate against the adherents of the traitor. War he detested, as the disgrace and calamity of human nature; but when the necessity of a just defence called upon him to take up arms, he readily exposed his person to eight winter campaigns on the frozen banks of the Danube, the severity of which was at last fatal to the weakness of his constitution. His memory was revered by a grateful posterity, and above a century after his death many persons preserved the image of Marcus Antoninus among those of their household gods.

If a man were called to fix the period in the history of the world during which the condition of the human race was most happy and prosperous, he would, without hesitation, name that which elapsed from the death of Domitian to the accession of Commodus. The vast extent of the Roman empire was governed by absolute power, under the guidance of virtue and wisdom. The armies were restrained by the firm but gentle hand of four successive emperors, whose characters and authority commanded involuntary respect. The forms of the civil administration were carefully preserved by Nerva, Trajan, Hadrian, and the Antonines, who delighted in the image of liberty, and were pleased with considering themselves as the accountable ministers of the laws. Such princes deserved the honour of restoring the republic, had the Romans of their days been capable of enjoying a rational freedom.

The labours of these monarchs were overpaid by the immense reward that inseparably waited on their success; by the honest pride of virtue, and by the exquisite delight of beholding the general happiness of which they were the authors. A just but melancholy reflection embittered, however, the noblest of human enjoyments. They must often have recollected the instability of a happiness which depended on the character of a single man. The fatal moment was perhaps approaching, when some licentious youth, or some jealous tyrant, would abuse, to the destruction, that absolute power which they had exerted for the benefit of their people. The ideal restraints of the senate and the laws might serve to display the virtues, but could never correct the vices, of the emperor. The military force was a blind and irresistible instrument of oppression; and the corruption of Roman manners would always supply flatterers eager to applaud, and