What is the Smoke of Satan?

And here we have already some of the artifices employed by Modernists to exploit their wares. What efforts do they not make to win new recruits! They seize upon professorships in the seminaries and universities, and gradually make of them chairs of pestilence. In sermons from the pulpit they disseminate their doctrines, although possibly in utterances which are veiled. In congresses they express their teachings more openly. In their social gatherings they introduce them and commend them to others. Under their own names and under pseudonyms they publish numbers of books, newspapers, reviews, and sometimes one and the same writer adopts a variety of pseudonyms to trap the incautious reader into believing in a multitude of Modernist writers. In short, with feverish activity they leave nothing untried in act, speech, and writing. And with what result? We have to deplore the spectacle of many young men, once full of promise and capable of rendering great services to the Church, now gone astray. It is also a subject of grief to Us that many others who, while they certainly do not go so far as the former, have yet been so infected by breathing a poisoned atmosphere, as to think, speak, and write with a degree of laxity which ill becomes a Catholic. They are to be found among the laity, and in the ranks of the clergy, and they are not wanting even in the last place where one might expect to meet them, in religious communities If they treat of biblical questions, it is upon Modernist principles; if they write history, they carefully, and with ill-concealed satisfaction, drag into the light, on the plea of telling the whole truth, everything that appears to cast a stain upon the Church. Under the sway of certain a priori conceptions they destroy as far as they can the pious traditions of the people, and bring into disrespect certain relics highly venerable from their antiquity. They are possessed by the empty desire of having their names upon the lips of the public, and they know they would never succeed in this were they to say only what has always been said by all men. Meanwhile it may be that they have persuaded themselves that in all this they are really serving God and the Church. In reality they only offend both, less perhaps by their works in themselves than by the spirit in which they write, and by the encouragement they thus give to the aims of the Modernists.

(Pascendi Dominici Gregis 43, 1907)