42 If only they had displayed less zeal and energy in propagating it! But such is their activity and such their unwearying capacity for work on behalf of their cause, that one cannot but be pained to see them waste such labour in endeavouring to ruin the Church when they might have been of such service to her had their efforts been better employed. Their articles to delude men's minds are of two kinds, the first to remove obstacles from their path, the second to devise and apply actively and patiently every instrument that can serve their purpose. They recognise that the three chief difficulties for them are scholastic philosophy, the authority of the fathers and tradition, and the magisterium of the Church, and on these they wage unrelenting war. For scholastic philosophy and theology they have only ridicule and contempt. Whether it is ignorance or fear, or both, that inspires this conduct in them, certain it is that the passion for novelty is always united in them with hatred of scholasticism, and there is no surer sign that a man is on the way to Modernism than when he begins to show his dislike for this system. Modernists and their admirers should remember the proposition condemned by Pius IX: The method and principles which have served the doctors of scholasticism when treating of theology no longer correspond with the exigencies of our time or the progress of science (Syll. Prop. 13). They exercise all their ingenuity in diminishing the force and falsifying the character of tradition, so as to rob it of all its weight. But for Catholics the second Council of Nicea will always have the force of law, where it condemns those who dare, after the impious fashion of heretics, to deride the ecclesiastical traditions, to invent novelties of some kind . . . or endeavour by malice or craft to overthrow any one of the legitimate traditions of the Catholic Church ; and Catholics will hold for law, also, the profession of the fourth Council of Constantinople: We therefore profess to conserve and guard the rules bequeathed to the Holy Catholic and Apostolic Church by the Holy and most illustrious Apostles, by the orthodox Councils, both general and local, and by every one of those divine interpreters the Fathers and Doctors of the Church . Wherefore the Roman Pontiffs, Pius IV. and Pius IX., ordered the insertion in the profession of faith of the following declaration: I most firmly admit and embrace the apostolic and ecclesiastical traditions and other observances and constitutions of the Church . The Modernists pass the same judgment on the most holy Fathers of the Church as they pass on tradition; decreeing, with amazing effrontery that, while personally most worthy of all veneration, they were entirely ignorant of history and criticism, for which they are only excusable on account of the time in which they lived. Finally, the Modernists try in every way to diminish and weaken the authority of the ecclesiastical magisterium itself by sacrilegiously falsifying its origin, character, and rights, and by freely repeating the calumnies of its adversaries. To all the band of Modernists may be applied those words which Our Predecessor wrote with such pain: To bring contempt and odium on the mystic Spouse of Christ, who is the true light, the children of darkness have been wont to cast in her face before the world a stupid calumny, and perverting the meaning and force of things and words, to depict her as the friend of darkness and ignorance, and the enemy of light, science, and progress (Motu-proprio, Ut mysticum , 14 March, 1891). This being so, Venerable Brethren, no wonder the Modernists vent all their gall and hatred on Catholics who sturdily fight the battles of the Church. But of all the insults they heap on them those of ignorance and obstinacy are the favourites. When an adversary rises up against them with an erudition and force that render him redoubtable, they try to make a conspiracy of silence around him to nullify the effects of his attack, while in flagrant contrast with this policy towards Catholics, they load with constant praise the writers who range themselves on their side, hailing their works, excluding novelty in every page, with choruses of applause; for them the scholarship of a writer is in direct proportion to the recklessness of his attacks on antiquity, and of his efforts to undermine tradition and the ecclesiastical magisterium; when one of their number falls under the condemnations of the Church the rest of them, to the horror of good Catholics, gather round him, heap public praise upon him, venerate him almost as a martyr to truth. The young, excited and confused by all this glamour of praise and abuse, some of them afraid of being branded as ignorant, others ambitious to be considered learned, and both classes goaded internally by curiosity and pride, often surrender and give themselves up to Modernism.
Source: Pascendi Dominici Gregis (Vatican.va)