I’m inferring the Denz. 3869-72 refers to a range of numbers, 3869 through 3872, of which the following would make up at least a portion of the content:
Pius XII – Letter of the Holy Office to the Archbishop of Boston, August 8, 1949
Given on August 8, 1949 explaining the true sense of the Catholic doctrine that there is no salvation outside the Church.
This important Letter of the Holy Office is introduced by a letter of the Most Reverend Archbishop of Boston.
The Supreme Sacred Congregation of the Holy Office has examined again the problem of Father Leonard Feeney and St. Benedict Center. Having studied carefully the publications issued by the Center, and having considered all the circumstances of this case, the Sacred Congregation has ordered me to publish, in its entirety, the letter which the same Congregation sent me on the 8th of August, 1949. The Supreme Pontiff, His Holiness, Pope Pius XII, has given full approval to this decision. In due obedience, therefore, we publish, in its entirety, the Latin text of the letter as received from the Holy Office with an English translation of the same approved by the Holy See.
Given at Boston, Mass., the 4th day of September, 1952.
Walter J. Furlong, Chancellor
Richard J. Cushing, Archbishop of Boston.
LETTER OF THE HOLY OFFICE
From the Headquarters of the Holy Office, Aug. 8, 1949.
This Supreme Sacred Congregation has followed very attentively the rise and the course of the grave controversy stirred up by certain associates of “St. Benedict Center” and “Boston College” in regard to the interpretation of that axiom: “Outside the Church there is no salvation.”
After having examined all the documents that are necessary or useful in this matter, among them information from your Chancery, as well as appeals and reports in which the associates of “St. Benedict Center” explain their opinions and complaints, and also many other documents pertinent to the controversy, officially collected, the same Sacred Congregation is convinced that the unfortunate controversy arose from the fact that the axiom, “outside the Church there is no salvation,” was not correctly understood and weighed, and that the same controversy was rendered more bitter by serious disturbance of discipline arising from the fact that some of the associates of the institutions mentioned above refused reverence and obedience to legitimate authorities.
Accordingly, the Most Eminent and Most Reverend Cardinals of this Supreme Congregation, in a plenary session held on Wednesday, July 27, 1949, decreed, and the august Pontiff in an audience on the following Thursday, July 28, 1949, deigned to give his approval, that the following explanations pertinent to the doctrine, and also that invitations and exhortations relevant to discipline be given:
We are bound by divine and Catholic faith to believe all those things which are contained in the word of God, whether it be Scripture or Tradition, and are proposed by the Church to be believed as divinely revealed, not only through solemn judgment but also through the ordinary and universal teaching office (, n. 1792).
Now, among those things which the Church has always preached and will never cease to preach is contained also that infallible statement by which we are taught that there is no salvation outside the Church.
However, this dogma must be understood in that sense in which the Church herself understands it. For, it was not to private judgments that Our Savior gave for explanation those things that are contained in the deposit of faith, but to the teaching authority of the Church.
Now, in the first place, the Church teaches that in this matter there is question of a most strict command of Jesus Christ. For He explicitly enjoined on His apostles to teach all nations to observe all things whatsoever He Himself had commanded (Matt. 28: 19-20).
Now, among the commandments of Christ, that one holds not the least place by which we are commanded to be incorporated by baptism into the Mystical Body of Christ, which is the Church, and to remain united to Christ and to His Vicar, through whom He Himself in a visible manner governs the Church on earth.
Therefore, no one will be saved who, knowing the Church to have been divinely established by Christ, nevertheless refuses to submit to the Church or withholds obedience from the Roman Pontiff, the Vicar of Christ on earth.