But [the Arabs'] friendship was venal, their faith inconstant, their enmity capricious: it was an easier task to excite than to disarm these roving barbarians; and, in the familiar intercourse of war, they learned to see, and to despise, the splendid weakness both of Rome and of Persia.

Our toil is lessened, and our wealth is increased, by our dominion over the useful animals . . .

The savage nations of the globe are the common enemies of civilized society; and we may inquire, with anxious curiosity, whether Europe is still threatened with a repetition of those calamities, which formerly oppressed the arms and institutions of Rome.

Revenge is profitable, gratitude is expensive.

The manly pride of the Romans, content with substantial power, had left to the vanity of the East the forms and ceremonies of ostentatious greatness. But when they lost even the semblance of those virtues which were derived from their ancient freedom, the simplicity of Roman manners was insensibly corrupted by the stately affectation of the courts of Asia.

But this inestimable privilege was soon violated: with the knowledge of truth the emperor imbibed the maxims of persecution; and the sects which dissented from the catholic church were afflicted and oppressed by the triumph of Christianity. Constantine easily believed that the heretics, who presumed to dispute his opinions or to oppose his commands, were guilty of the most absurd and criminal obstinacy; and that a seasonable application of moderate severities might save those unhappy men from the danger of an everlasting condemnation.

The valuable library of Alexandria was pillaged or destroyed; and near twenty years afterwards, the appearance of the empty shelves excited the regret and indignation of every spectator whose mind was not totally darkened by religious prejudice. The compositions of ancient genius, so many of which have irretrievably perished, might surely have been excepted from the wreck of idolatry, for the amusement and instruction of succeeding ages.