We must repeat with the utmost energy in these times of social and intellectual anarchy when everyone takes it upon himself to teach as a teacher and lawmaker - the City cannot be built otherwise than as God has built it; society cannot be setup unless the Church lays the foundations and supervises the work; no, civilization is not something yet to be found, nor is the New City to be built on hazy notions; it has been in existence and still is: it is Christian civilization, it is the Catholic City. It has only to be set up and restored continually against the unremitting attacks of insane dreamers, rebels and miscreants. OMNIA INSTAURARE IN CHRISTO.
The same applies to the notion of Fraternity which they found on the love of common interest or, beyond all philosophies and religions, on the mere notion of humanity, thus embracing with an equal love and tolerance all human beings and their miseries, whether these are intellectual, moral, or physical and temporal. But Catholic doctrine tells us that the primary duty of charity does not lie in the toleration of false ideas, however sincere they may be, nor in the theoretical or practical indifference towards the errors and vices in which we see our brethren plunged, but in the zeal for their intellectual and moral improvement as well as for their material well-being. Catholic doctrine further tells us that love for our neighbor flows from our love for God, Who is Father to all, and goal of the whole human family; and in Jesus Christ whose members we are, to the point that in doing good to others we are doing good to Jesus Christ Himself. Any other kind of love is sheer illusion, sterile and fleeting.
...as if everything that benefited the Church did not benefit the whole human race! A curious reversal of notions! The Church might benefit from social action! As if the greatest economists had not recognized and proved that it is social action alone which, if serious and fruitful, must benefit the Church! But stranger still, alarming and saddening at the same time, are the audacity and frivolity of men who call themselves Catholics and dream of re-shaping society under such conditions, and of establishing on earth, over and beyond the pale of the Catholic Church, "the reign of love and justice" with workers coming from everywhere, of all religions and of no religion, with or without beliefs, so long as they forego what might divide them - their religious and philosophical convictions, and so long as they share what unites them - a "generous idealism and moral forces drawn from whence they can" When we consider the forces, knowledge, and supernatural virtues which are necessary to establish the Christian City, and the sufferings of millions of martyrs, and the light given by the Fathers and Doctors of the Church, and the self-sacrifice of all the heroes of charity, and a powerful hierarchy ordained in heaven, and the streams of Divine Grace - the whole having been built up, bound together, and impregnated by the life and spirit of Jesus Christ, the Wisdom of God, the Word made man - when we think, I say, of all this, it is frightening to behold new apostles eagerly attempting to do better by a common interchange of vague idealism and civic virtues. What are they going to produce? What is to come of this collaboration? A mere verbal and chimerical construction in which we shall see, glowing in a jumble, and in seductive confusion, the words Liberty, Justice, Fraternity, Love, Equality, and human exultation, all resting upon an ill-understood human dignity. It will be a tumultuous agitation, sterile for the end proposed, but which will benefit the less Utopian exploiters of the people. Yes, we can truly say that the Sillon, its eyes fixed on a chimera, brings Socialism in its train.
We fear that worse is to come: the end result of this developing promiscuousness, the beneficiary of this cosmopolitan social action, can only be a Democracy which will be neither Catholic, nor Protestant, nor Jewish. It will be a religion (for Sillonism, so the leaders have said, is a religion) more universal than the Catholic Church, uniting all men become brothers and comrades at last in the "Kingdom of God". - "We do not work for the Church, we work for mankind."
We wish to draw your attention, Venerable Brethren, to this distortion of the Gospel and to the sacred character of Our Lord Jesus Christ, God and man, prevailing within the Sillon and elsewhere. As soon as the social question is being approached, it is the fashion in some quarters to first put aside the divinity of Jesus Christ, and then to mention only His unlimited clemency, His compassion for all human miseries, and His pressing exhortations to the love of our neighbor and to the brotherhood of men. True, Jesus has loved us with an immense, infinite love, and He came on earth to suffer and die so that, gathered around Him in justice and love, motivated by the same sentiments of mutual charity, all men might live in peace and happiness. But for the realization of this temporal and eternal happiness, He has laid down with supreme authority the condition that we must belong to His Flock, that we must accept His doctrine, that we must practice virtue, and that we must accept the teaching and guidance of Peter and his successors. Further, whilst Jesus was kind to sinners and to those who went astray, He did not respect their false ideas, however sincere they might have appeared. He loved them all, but He instructed them in order to convert them and save them. Whilst He called to Himself in order to comfort them, those who toiled and suffered, it was not to preach to them the jealousy of a chimerical equality. Whilst He lifted up the lowly, it was not to instill in them the sentiment of a dignity independent from, and rebellious against, the duty of obedience. Whilst His heart overflowed with gentleness for the souls of good-will, He could also arm Himself with holy indignation against the profaners of the House of God, against the wretched men who scandalized the little ones, against the authorities who crush the people with the weight of heavy burdens without putting out a hand to lift them. He was as strong as he was gentle. He reproved, threatened, chastised, knowing, and teaching us that fear is the beginning of wisdom, and that it is sometimes proper for a man to cut off an offending limb to save his body. Finally, He did not announce for future society the reign of an ideal happiness from which suffering would be banished; but, by His lessons and by His example, He traced the path of the happiness which is possible on earth and of the perfect happiness in heaven: the royal way of the Cross. These are teachings that it would be wrong to apply only to one's personal life in order to win eternal salvation; these are eminently social teachings, and they show in Our Lord Jesus Christ something quite different from an inconsistent and impotent humanitarianism.
-- Pope St. Pius X, "Our Apostolic Mandate", Letter regarding the Sillon, 1910