Religious errors

But now... when, seeing with the greatest grief of Our soul a truly awful storm excited by so many evil opinions, and (seeing also) the most grievous calamities never sufficiently to be deplored which overspread the Christian people from so many errors, according to the duty of Our Apostolic Ministry, and following the illustrious example of Our Predecessors, We raised Our voice, and in many published Encyclical Letters and Allocutions delivered in Consistory, and other Apostolic Letters, we condemned the chief errors of this most unhappy age, and we excited your admirable episcopal vigilance, and we again and again admonished and exhorted all sons of the Catholic Church, to us most dear, that they should altogether abhor and flee from the contagion of so dire a pestilence. And especially in our first Encyclical Letter written to you on Nov. 9, 1846, and in two Allocutions delivered by us in Consistory, the one on Dec. 9, 1854, and the other on June 9, 1862, we condemned the monstrous portents of opinion which prevail especially in this age, bringing with them the greatest loss of souls and detriment of civil society itself; which are grievously opposed also, not only to the Catholic Church and her salutary doctrine and venerable rights, but also to the eternal natural law engraven by God in all men's hearts, and to right reason; and from which almost all other errors have their origin. (Papal Encyclical, Condemning Current Errors: Quanta Cura, 8 December 1986).