VI. Books of controversy betwixt the Catholics and heretics of the present time, written in the vulgar tongue, are not to be indiscriminately allowed, but are to be subject to the same regulations as Bibles in the vulgar tongue. As to those works in the vulgar tongue which treat of morality, contemplation, confession, and similar subjects, and which contain nothing contrary to sound doctrine, there is no reason why they should be prohibited; the same may be said also of sermons in the vulgar tongue, designed for the people. And if in any kingdom or province, any books have been hitherto prohibited as containing things not proper to be read without selection by all sorts of persons, they may after correction, if written by Catholic authors, be allowed by the bishop and inquisitor. VII. Books professedly treating of lascivious or obscene subjects, or narrating or teaching these, are utterly prohibited, since not only faith but morals, which are readily corrupted by the perusal of them, are to be considered; and those who possess them shall be severely punished by the bishop. But the works of antiquity, written by the heathen, are permitted to be read, because of the elegance and propriety of the language; though on no account shall they be suffered to be read by young persons. VIII. Books, the principal subject of which is good, but in which some things are occasionally introduced tending to heresy and impiety, divination, or superstition, may be allowed, after they have been corrected by Catholic divines, under the authority of the general Inquisition. The same judgment is also given concerning prefaces, summaries, or notes, taken from condemned authors, and inserted in the works of authors not condemned; but such works must not be printed in future, until they have been amended. IX. All books and writings of geomancy, hydromancy, aeromancy, pyromancy, onomancy, cheiromancy, and necromancy; or which treat of sorceries, poisons, auguries, auspices, or magical incantations are utterly rejected. The bishops shall also diligently guard against any persons reading or keeping any books, treatises, or indexes which treat of judicial astrology or contain presumptuous predictions of the events of future contingencies, and fortuitous occurrences, or of those actions which depend upon the will of man. But such opinions and observations of natural things as are written in aid of navigation, agriculture, and medicine are permitted.