T 3.2.12.6

Such wou'd be the reasonings of our speculative philosopher: But I am persuaded, that if he had not a perfect knowledge of human nature, he wou'd be apt to regard them as mere chimerical speculations, and wou'd consider the infamy attending infidelity, and backwardness to all its approaches, as principles that were rather to be wish'd than hop'd for in the world. For what means, wou'd he say, of persuading mankind, that the transgressions of conjugal duty are more infamous than any other kind of injustice, when 'tis evident they are more excusable, upon account of the greatness of the temptation? And what possibility of giving a backwardness to the approaches of a pleasure, to which nature has inspir'd so strong a propensity; and a propensity that 'tis absolutely necessary in the end to comply with, for the support of the species?