ON THE DOCTRINE OF THE MODERNISTS
ENCYCLICAL OF POPE PIUS X, SEPTEMBER 8, 1907
The partisans of error are to be sought not only among the Church's open enemies; but, what is to be most dreaded and deplored, in her very bosom, and are the more mischievous the less they keep in the open. We allude, Venerable Brethren, to many who belong to the Catholic laity, and, what is much more sad, to the ranks of the priesthood itself. (...)
With regard to morals, they adopt the principle of the Americanists, that the active virtues are more important than the passive, and are to be more encouraged in practice. They ask that the clergy should return to their primitive humility and poverty, and that in their ideas and action they should admit the principles of Modernism; and there are some who, gladly listening to the teaching of their Protestant masters, would desire the suppression of the celibacy of the clergy. What is there left in the Church which is not to be reformed by them and according to their principles?