Showing the continuity from “Mystici Corporis” to the Vatican II Decree on Ecumenism (and thus by extension to statements like that of the Council of Florence) is rather easy. Or at least it was for His Holiness Pope John Paul the Great, in “Ut Unum Sint”:
By God’s grace, however, neither what belongs to the structure of the Church of Christ nor that communion which still exists with the other Churches and Ecclesial Communities has been destroyed.
Indeed, the elements of sanctification and truth present in the other Christian Communities, in a degree which varies from one to the other, constitute the objective basis of the communion, albeit imperfect, which exists between them and the Catholic Church.
To the extent that these elements are found in other Christian Communities, the one Church of Christ is effectively present in them. …
- The same Dogmatic Constitution listed at length “the elements of sanctification and truth” which in various ways are present and operative beyond the visible boundaries of the Catholic Church: “For there are many who honour Sacred Scripture, taking it as a norm of belief and of action, and who show a true religious zeal. They lovingly believe in God the Father Almighty and in Christ, Son of God and Saviour. They are consecrated by Baptism, through which they are united with Christ. They also recognize and receive other sacraments within their own Churches or Ecclesial Communities. Many of them rejoice in the episcopate, celebrate the Holy Eucharist, and cultivate devotion towards the Virgin Mother of God. They also share with us in prayer and other spiritual benefits. Likewise, we can say that in some real way they are joined with us in the Holy Spirit, for to them also he gives his gifts and graces, and is thereby operative among them with his sanctifying power. Some indeed he has strengthened to the extent of the shedding of their blood. In all of Christ’s disciples the Spirit arouses the desire to be peacefully united, in the manner determined by Christ, as one flock under one shepherd”.15
The Council’s Decree on Ecumenism, referring to the Orthodox Churches, went so far as to declare that “through the celebration of the Eucharist of the Lord in each of these Churches, the Church of God is built up and grows in stature”.16 Truth demands that all this be recognized.
The bottom line is this: Within Pope Pius XII’s straightforward statement regarding “those who have been baptized and profess the true faith” is the basis for membership in the Church that includes those “imperfectly” in communion with her.
Pius XII would
never negate or diminish the true power and effects of the Sacrament of Baptism validly administered. These effects are “ex opere operato”–accomplished by the very “doing” of the act.
The Church–including Pius XII–has
always infallibly taught that Baptism BY ITSELF “incorporates us into the Body of Christ.”
Period. Would anyone care to disagree with me on this?
Not only that, but Pius XII had
no problem with
infant baptism, and no problem stating that infants were members of the Church
despite their inability to personally “profess the true faith”.
Any disagreement?
And, as these are the most
ancient of teachings in the Church, his encyclical “Mystici Corporis” could not
add or
change anything to this doctrine, since the Church has infallibly taught that what has
always been believed by the Church regarding such dogmas
must be maintained for all time.
Therefore, Pius XII could
not place any additional conditions upon Church “membership” than what the Church has always taught, which is that
Baptism alone incorporates one into the Body of Christ.
Thus, as taught in the Decree on Ecumenism–infallibly–all those properly baptized are part of the Body of Christ. Period.
However, the Decree points out that those who are baptized who do
not practice the true faith fully have an “imperfect” communion with the Church–the elements of truth they
do possess are what sustains the communion, but it is made imperfect by being only
partial.
Now, once our separated brothers and sisters begin
consciously to reject communion with the Catholic Church, we enter the realm Pius really
was speaking of–in which lack of professing the “true faith” becomes
more determinative than our baptismal status is.
It’s really simple. Baptism creates the “default” setting of a person being a member of the Church.
Then it’s up to such a person to become responsible for whether that “default” setting remains or is altered.
That’s why there is no disparity between Pius, Vatican II, John Paul II, and, yes, even the Council of Florence’s teaching that started this thread…
DJim