The condition of literature in recent times would seem to be in disagreement with this affirmation, since as a fact there is a great falling off in the appearance of books of rules, compared with the enormous mass that remains in our libraries as an inheritance of the past. At one time rules of conduct were compiled for everything, not only for the moral life, in the multiplication of treatises relating to vice and virtue, to merits and to sins, to things good and evil, to duties and to rights, dividing these and entering into minutiae, and again, summaries, catechisms, and various "decalogues," relating to every part of life. The literature of the Cinquecento gives rules even for the procuress and the courtesan, in most elegant little books, which bear the names of Piccolomini and of Aretino. In this same century, too, Ignatius of Loyola formulated rules for "tying up" the will, and for the reduction of the docile individual _perinde ac cadaver,_ for the ends of "sanctity." We must further remark that all rules, including those on poetry and the arts, have at bottom a practical--character. That is to say, they are directed to the will, if only as intermediary. Thus it is necessary to add to the great mass of practical rules the unnumbered and innumerable treatises of Grammar, Rhetoric, Poetry of the figurative arts, of music, of dancing, and so on. But it is a fact that there are now hardly any treatises containing rules, either for morality, politics, or for the arts. Has the world by chance become learned on the subject, through inherited aptitude, or rather has the inutility of rules been discovered? Neither the one nor the other. The rules still live in books and treatises; they have only changed their literary form. In literature they have reabsorbed that imperative which they used at first to display and to boast of, not only mentally but literally. That has been made possible by the already established convertibility of rules into psychological classes. Hence in modern times the literary form of the psychological observation is preferred to that of rules. This was indeed redundant, pedantic, and at the same time ingenuous, as for instance in the Italian Seicento. It is difficult to restrain a smile when reading the many books on what was called the _reason of State,_ elaborated by the Italians of that day and imitated by foreigners, especially Spaniards and Germans. Those _arcana imperii,_ those "secret strokes," those impostures, mysteriously inculcated on the printed page, are a true and real æsthetic contradiction. The eighteenth century therefore began to give up this form of treatise, and as it happens that men are accustomed to attribute to moral virtue that which is necessity or virtue of another kind, the writers of that century boasted of the moral progress which had set them free from the pernicious and immodest maxims of the "reason of State."