I was never less alone than when by myself.

All that is human must retrograde if it does not advance.

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

Although the progress of civilisation has undoubtedly contributed to assuage the fiercer passions of human nature, it seems to have been less favourable to the virtue of chastity, whose most dangerous enemy is the softness of the mind. The refinements of life corrupt while they polish the intercourse of the sexes. The gross appetite of love becomes most dangerous when it is elevated, or rather, indeed, disguised by sentimental passion.

That country [Carthage] was rapidly sinking into the state of barbarism from whence it had been raised by the Phoenician colonies and Roman laws; and every step of intestine discord was marked by some deplorable victory of savage man over civilized society.

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.

In the most rigorous [Roman] laws, a wife was condemned to support a gamester, a drunkard, or a libertine, unless he were guilty of homicide, poison, or sacrilege, in which cases the marriage, as it should seem, might have been dissolved by the hand of the executioner.