_Public opinion_ every instant offers to man's contemplation false ideas of honor, and wrong notions of glory: it attaches his esteem not only to frivolous advantages, but also to prejudicial interests and injurious actions; which example authorizes, which prejudice consecrates, which habit precludes him from viewing with the disgust and horror which they merit. Indeed, habit familiarizes his mind with the most absurd ideas, the most unreasonable customs, the most blameable actions; with prejudices the most contrary to his own interests, and detrimental to the society in which he lives. He finds nothing strange, nothing singular, nothing despicable, nothing ridiculous, except those opinions and objects to which he is himself unaccustomed. There are countries in which the most laudable actions appear very blameable and ridiculous--where the foulest and most diabolical actions pass for very honest and perfectly rational conduct. In some nations they kill the old men; in some the children strangle their fathers. The Phoenicians and Carthaginians immolated their children to their gods. Europeans approve duels; he who refuses to cut the throat of another, or to blow out the brains of his neighbour, is contemplated by them as dishonoured. The Spaniards and Portuguese think it meritorious to burn an heretic. In some countries women prostitute themselves without dishonour; in others it is the height of hospitality for a man to present his wife to the embraces of the stranger: the refusal to accept this, excites his scorn and calls forth his resentment. _Authority_ commonly believes itself interested in maintaining the received opinions: those prejudices and errors which it considers requisite to the maintenance of its power and the consolidation of its interests, are sustained by force, which is never rational. Princes themselves, filled with deceptive images of happiness, mistaken notions of power, erroneous opinions of grandeur, and false ideas of glory, are surrounded with flattering courtiers, who are interested in keeping up the delusion of their masters: these contemptible men have acquired ideas of virtue, only that they may outrage it: by degrees they corrupt the people, these become depraved, lend themselves to their debaucheries, pander to the vices of the great, then make a merit of imitating them in their irregularities. A court is too frequently the true focus of the corruption of a people.