de of virtue, and
by the exquisite delight of beholding the general happiness of which
they were the authors. A just but melancholy reflection imbittered,
however, the noblest of human enjoyments. They must often have
recollected the instability of a happiness which depended on the
character of 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 ministers prepared to serve, the fear
or the avarice, the lust or the cruelty, of their master.

These gloomy apprehensions had been already justified by the experience
of the Romans. The annals of the emperors exhibit a strong and various
picture of human nature, which we should vainly seek among the mixed and
doubtful characters of modern history. In the conduct of those monarchs
we may trace the utmost lines of vice and virtue; the most exalted
perfection, and the meanest degeneracy of our own species. The golden
age of Trajan and the Antonines had been preceded by an age of iron. It
is almost superfluous to enumerate the unworthy successors of Augustus.
Their unparalleled vices, and the splendid theatre on which they were
acted, have saved them from oblivion. The dark, unrelenting Tiberius,
the furious Caligula, the feeble Claudius, the profligate and cruel
Nero, the beastly Vitellius, and the timid, inhuman Domitian, are
condemned to everlasting infamy. During fourscore years (excepting
only the short and doubtful respite of Vespasian's reign) Rome groaned
beneath an unremitting tyranny, which exterminated the ancient families
of the republic, and was fatal to almost every virtue and every talent
that arose in that unhappy period.

Under the reign of these monsters, the slavery of the Romans was
accompanied with two peculiar circumstances, the one occasioned by their
former liberty, the other by their extensive conquests, which rendered
their condition more completely wretched than that of the victims of
tyranny in any other age or country. From these causes were derived, 1.
The exquisite sensibility of the sufferers; a