"It follows that these separated Churches and Communities, though we believe that they suffer from defects, have by no means been deprived of significance and value in the mystery of salvation. For the Spirit of Christ has not refrained from using them as means of salvation which derive their efficacy from the very fullness of grace and truth entrusted to the Catholic Church".12
I'm sorry to interrupt here, but that just jumped out at me. What does that MEAN? Do you really think that this is clear? I'm not the most intelligent person in the world, but I'm not stupid. That is gobblety gook. Do you really believe that clarifies Traditional Catholic doctrine?
"these separated Churches and Communities,"(not part of the Catholic Church, in that they are [separated] from Her,)[snip]" Christ has not refrained from using them as means of salvation".
Other "churches" are a means of salvation? Although they are not Catholic, they still can "derive efficacy from the Catholic Church". Heck, why bother being Catholic.
Boy it's a good thing the pope wasn't a car salesman. I can just imagine the sales pitch:
I have the best, most equipped cars, but the other car dealerships also have cars that will get you where you need to go to, (most of them for far less cost and maintenance, too by the way).
Moreover, some and even very many of the significant elements and endowments which together go to build up and give life to the Church itself, can exist outside the visible boundaries of the Catholic Church: the written word of God; the life of grace; faith, hope and charity, with the other interior gifts of the Holy Spirit, and visible elements too. All of these, which come from Christ and lead back to Christ, belong by right to the one Church of Christ.The brethren divided from us also use many liturgical actions of the Christian religion. These most certainly can truly engender a life of grace in ways that vary according to the condition of each Church or Community. These liturgical actions must be regarded as capable of giving access to the community of salvation.
It follows that the separated Churches(23) and Communities as such, though we believe them to be deficient in some respects, have been by no means deprived of significance and importance in the mystery of salvation. For the Spirit of Christ has not refrained from using them as means of salvation which derive their efficacy from the very fullness of grace and truth entrusted to the Church.
Nevertheless, our separated brethren, whether considered as individuals or as Communities and Churches, are not blessed with that unity which Jesus Christ wished to bestow on all those who through Him were born again into one body, and with Him quickened to newness of life-that unity which the Holy Scriptures and the ancient Tradition of the Church proclaim. For it is only through Christ's Catholic Church, which is "the all-embracing means of salvation," that they can benefit fully from the means of salvation.
I would point out to you the paragraph preceding the one that you single out, which states: "These liturgical actions must be regarded as capable of giving access to the community of salvation." The conclusion is that the separated Churches and communities of heretics and schismatics are used as "means of salvation", insofar as "the significant elements and endowments which together go to build up and give life to the Church", which are held in these false sects, can justify and save. Compare to Journet's comments in Church of the Word Incarnate vol. 1, IX, 2, 1:
Those who are responsible before God for a schism or a heresy may carry away with them the valid succession of the sacrament of Holy Order. They do so in the darkness of a personal sin by which they partially rend the Church; and insofar as their own hearts are closed to the good influence of the sacraments they are like sick men taking to others medicines which they do not know how to use for their own benefit. But their followers in later times, who inherit a patrimony of schism or heresy from their birth, are not culpable on that account. They can grow in spiritual stature by remaining in good faith. The sanctifying influence of the sacraments, no longer finding the same obstacles in the will, can result in graces of a high order.
A better car analogy would be: "I sell the only new cars in this town. True, the guy over there stole some of my beat-up display models, but since you know that now, I doubt that the cops will let you get away with buying one - you'll have to give me back my car, and lose your money to him besides."