Pope Pius X
Pascendi Dominici Gregis §27
Pascendi Dominici Gregis: On the Doctrines of the Modernists
27 Still continuing the consideration of the evolution of doctrine, it is to be noted that Evolution is due no doubt to those stimulants styled needs, but, if left to their action alone, it would run a great risk of bursting the bounds of tradition, and thus, turned aside from its primitive vital principle, would lead to ruin instead of progress. Hence, studying more closely the ideas of the Modernists, evolution is described as resulting from the conflict of two forces, one of them tending towards progress, the other towards conservation. The conserving force in the Church is tradition, and tradition is represented by religious authority, and this both by right and in fact; for by right it is in the very nature of authority to protect tradition, and, in fact, for authority, raised as it is above the contingencies of life, feels hardly, or not at all, the spurs of progress. The progressive force, on the contrary, which responds to the inner needs lies in the individual consciences and ferments there - especially in such of them as are in most intimate contact with life. Note here, Venerable Brethren, the appearance already of that most pernicious doctrine which would make of the laity a factor of progress in the Church. Now it is by a species of compromise between the forces of conservation and of progress, that is to say between authority and individual consciences, that changes and advances take place. The individual consciences of some of them act on the collective conscience, which brings pressure to bear on the depositaries of authority, until the latter consent to a compromise, and, the pact being made, authority sees to its maintenance. With all this in mind, one understands how it is that the Modernists express astonishment when they are reprimanded or punished. What is imputed to them as a fault they regard as a sacred duty. Being in intimate contact with consciences they know better than anybody else, and certainly better than the ecclesiastical authority, what needs exist - nay, they embody them, so to speak, in themselves. Having a voice and a pen they use both publicly, for this is their duty. Let authority rebuke them as much as it pleases - they have their own conscience on their side and an intimate experience which tells them with certainty that what they deserve is not blame but praise. Then they reflect that, after all there is no progress without a battle and no battle without its victim, and victims they are willing to be like the prophets and Christ Himself. They have no bitterness in their hearts against the authority which uses them roughly, for after all it is only doing its duty as authority. Their sole grief is that it remains deaf to their warnings, because delay multiplies the obstacles which impede the progress of souls, but the hour will most surely come when there will be no further chance for tergiversation, for if the laws of evolution may be checked for a while, they cannot be ultimately destroyed. And so they go their way, reprimands and condemnations notwithstanding, masking an incredible audacity under a mock semblance of humility. While they make a show of bowing their heads, their hands and minds are more intent than ever on carrying out their purposes. And this policy they follow willingly and wittingly, both because it is part of their system that authority is to be stimulated but not dethroned, and because it is necessary for them to remain within the ranks of the Church in order that they may gradually transform the collective conscience - thus unconsciously avowing that the common conscience is not with them, and that they have no right to claim to be its interpreters.
Source: Pascendi Dominici Gregis (Vatican.va)