[Excerpted from Section VII. The Catholic Church, Mystical Body of Christ and Sole Ark of Salvation.]
59. I profess that God willed to make the Church the necessary means of salvation; just as there is under Heaven no other name given to men than that of Jesus Christ by which we must be saved, so there is no supernatural salvation independent of the Catholic Church. For all salvation comes from Jesus Christ; and every saving grace is either given in and through the one Church He has founded, or orders the one who receives it to that same Church.
60. This truth means that no one can be saved without Christ and His Church, through a false religion as such, nor be assured of His salvation outside the visible structure of the Church. If men are saved without belonging to the visible society which is the Church, the Mystical Body of Christ, it is by a supernatural ordination to the one Church of salvation, and in spite of the errors of the false religions in which they find themselves, from which they free themselves by not refusing the grace offered to them and by corresponding to it.
61. I therefore reject false ecumenism, which rests upon the idea that the Holy Ghost would not refuse to use separated communities as means of salvation, as though the Church of Christ were present and active in them, or as though these communities possessed in themselves a salvific value whose efficacy would derive from the fullness of grace and truth entrusted to the Catholic Church. If any man comes to the revealed truth or receives a grace of sanctification outside the visible limits of the Catholic Church, that truth and that grace belong by right to that same Church and unequivocally call to Catholic unity, and the Holy Ghost does not give these as means of salvation by using separated communities as such, of which souls can never be warned too much.
62. I likewise reject the idea that non-Christian religions might reflect a ray of truth which illumines every man, or might be legitimate paths by which God positively leads men to salvation. Some fragments of natural truth, or distorted vestiges of ancient truths, may indeed be encountered among the adherents of these false religions; but these religions taken as such, and insofar as they mingle error with their worship, are the work of the devil and cannot be acceptable to God. The Holy Ghost does not use them as paths to salvation, and in them there is no proper virtue of the one Church of Christ, the sole light which enlightens every man in the darkness.
63. I further reject the idea of an ‘anonymous Christianity’, according to which any man who leads a naturally honest life, whether ‘believer’, atheist, or agnostic, would be oriented towards Christ and therefore saved by Him, as a ‘Christian’ without knowing it. 64. I finally profess that the Old Covenant has been fulfilled, surpassed, and rendered obsolete by the New Covenant, which is the fulfilment of the promise made to Abraham, in Christ and in His Church. The figures of the old Law have found their realization and their cessation in the Sacrifice of the true Lamb, Mediator of the New Covenant and Priest forever according to the order of Melchisedech. By the eternal Will of God, the true descendant of Abraham is Christ, together with those who belong to Him in His Mystical Body, which is the Church.
64. I finally profess that the Old Covenant has been fulfilled, surpassed, and rendered obsolete by the New Covenant, which is the fulfilment of the promise made to Abraham, in Christ and in His Church. The figures of the old Law have found their realization and their cessation in the Sacrifice of the true Lamb, Mediator of the New Covenant and Priest forever according to the order of Melchisedech. By the eternal Will of God, the true descendant of Abraham is Christ, together with those who belong to Him in His Mystical Body, which is the Church.
[Full text on the SSPX website.]
