21 What refers to domestic life in the teaching of the naturalists is almost all contained in the following declarations: that marriage belongs to the genus of commercial contracts, which can rightly be revoked by the will of those who made them, and that the civil rulers of the State have power over the matrimonial bond; that in the education of youth nothing is to be taught in the matter of religion as of certain and fixed opinion; and each one must be left at liberty to follow, when he comes of age, whatever he may prefer. To these things the Freemasons fully assent; and not only assent, but have long endeavoured to make them into a law and institution. For in many countries, and those nominally Catholic, it is enacted that no marriages shall be considered lawful except those contracted by the civil rite; in other places the law permits divorce; and in others every effort is used to make it lawful as soon as may be. Thus, the time is quickly coming when marriages will be turned into another kind of contract - that is into changeable and uncertain unions which fancy may join together, and which the same when changed may disunite. With the greatest unanimity the sect of the Freemasons also endeavours to take to itself the education of youth. They think that they can easily mold to their opinions that soft and pliant age, and bend it whither they will; and that nothing can be more fitted than this to enable them to bring up the youth of the State after their own plan. Therefore, in the education and instruction of children they allow no share, either of teaching or of discipline, to the ministers of the Church; and in many places they have procured that the education of youth shall be exclusively in the hands of laymen, and that nothing which treats of the most important and most holy duties of men to God shall be introduced into the instructions on morals.
Source: Humanum Genus (Vatican.va)