13. You already know well, venerable brothers, the other portentous errors and deceits by which the sons of this world try most bitterly to attack the Catholic religion and the divine authority of the Church and its laws. They would even trample underfoot the rights both of the sacred and of the civil power. For this is the goal of the lawless activities against this Roman See in which Christ placed the impregnable foundation of His Church. This is the goal of those secret sects who have come forth from the darkness to destroy and desolate both the sacred and the civil commonwealth. These have been condemned with repeated anathema in the Apostolic letters of the Roman Pontiffs who preceded Us. We now confirm these with the fullness of Our Apostolic power and command that they be most carefully observed.
14. This is the goal too of the crafty Bible Societies which renew the old skill of the heretics and ceaselessly force on people of all kinds, even the uneducated, gifts of the Bible. They issue these in large numbers and at great cost, in vernacular translations, which infringe the holy rules of the Church. The commentaries which are included often contain perverse explanations; so, having rejected divine tradition, the doctrine of the Fathers and the authority of the Catholic Church, they all interpret the words of the Lord by their own private judgment, thereby perverting their meaning. As a result, they fall into the greatest errors. Gregory XVI of happy memory, Our superior predecessor, followed the lead of his own predecessors in rejecting these societies in his apostolic letters. It is Our will to condemn them likewise.
15. Also perverse is the shocking theory that it makes no difference to which religion one belongs, a theory which is greatly at variance even with reason. By means of this theory, those crafty men remove all distinction between virtue and vice, truth and error, honorable and vile action. They pretend that men can gain eternal salvation by the practice of any religion, as if there could ever be any sharing between justice and iniquity, any collaboration between light and darkness, or any agreement between Christ and Belial.
16. The sacred celibacy of clerics has also been the victim of conspiracy. Indeed, some churchmen have wretchedly forgotten their own rank and let themselves be converted by the charms and snares of pleasure. This is the aim too of the prevalent but wrong method of teaching, especially in the philosophical disciplines, a method which deceives and corrupts incautious youth in a wretched manner and gives it as drink the poison of the serpent in the goblet of Babylon. To this goal also tends the unspeakable doctrine of Communism, as it is called, a doctrine most opposed to the very natural law. For if this doctrine were accepted, the complete destruction of everyone's laws, government, property, and even of human society itself would follow.
17. To this end also tend the most dark designs of men in the clothing of sheep, while inwardly ravening wolves. They humbly recommend themselves by means of a feigned and deceitful appearance of a purer piety, a stricter virtue and discipline; after taking their captives gently, they mildly bind them, and then kill them in secret. They make men fly in terror from all practice of religion, and they cut down and dismember the sheep of the Lord. To this end, finally -- to omit other dangers which are too well known to you -- tends the widespread disgusting infection from books and pamphlets which teach the lessons of sinning. These works, well-written and filled with deceit and cunning, are scattered at immense cost through every region for the destruction of the Christian people. They spread pestilential doctrines everywhere and deprave the minds especially of the imprudent, occasioning great losses for religion.
18. As a result of this filthy medley of errors which creeps in from every side, and as the result of the unbridled license to think, speak and write, We see the following: morals deteriorated, Christ's most holy religion despised, the majesty of divine worship rejected, the power of this Apostolic See plundered, the authority of the Church attacked and reduced to base slavery, the rights of bishops trampled on, the sanctity of marriage infringed, the rule of every government violently shaken and many other losses for both the Christian and the civil commonwealth. Venerable brothers, We are compelled to weep and share in your lament that this is the case.
-- from Qui Pluribus, Pope Pius IX, 1846