3. Among the many deplorable evils which disturb and afflict both ecclesiastical and civil society, two stand out in our day and are justly considered to be the cause of the others. In effect, you are aware of the innumerable and fatal damages which the hideous error of indifferentism causes to Christian and civil society. It causes us to forget out duties to God in whom we live and act and have our being. It causes us to slacken our concern for holy religion and shakes almost to destruction the very basis of all law, justice, and virtue. There is little difference between this hideous form of indifference and the devilish system of indifference between the different religions. This belief embraces people who have strayed from the truth, who are enemies of the true faith and forget their own salvation, and who teach contradictory beliefs without firm doctrine. They make no distinction between the different creeds, agree with everybody, and maintain that the haven of eternal salvation is open to sectarians of any religion. The diversity of their teachings does not concern them as long as they agree to combat that which alone is the truth.[1]
4. You see, dearly beloved sons and venerable brothers, how much vigilance is needed to keep the disease of this terrible evil from infecting and killing your flocks. Do not cease to diligently defend your people against these pernicious errors. Saturate them with the doctrine of Catholic truth more accurately each day. Teach them that just as there is only one God, one Christ, one Holy Spirit, so there is also only one truth which is divinely revealed. There is only one divine faith which is the beginning of salvation for mankind and the basis of all justification, the faith by which the just person lives and without which it is impossible to please God and to come to the community of His children.[2] There is only one true, holy, Catholic church, which is the Apostolic Roman Church. There is only one See founded in Peter by the word of the Lord,[3] outside of which we cannot find either true faith or eternal salvation. He who does not have the Church for a mother cannot have God for a father, and whoever abandons the See of Peter on which the Church is established trusts falsely that he is in the Church.[4] Thus, there can be no greater crime, no more hideous stain than to stand up against Christ, than to divide the Church engendered and purchased by His blood, than to forget evangelical love and to combat with the furor of hostile discord the harmony of the people of God.[5]
Pius XII stated unequivocally: “To be Christian one must be Roman. One must recognize the oneness of Christ’s Church that is governed by one successor of the Prince of the Apostles who is the Bishop of Rome, Christ’s Vicar on earth” (Allocution to the Irish pilgrims of October 8, 1957). How is it possible to be clearer than this about those who can be called Christian?
Leo XIII makes it plain that separated members cannot belong to the same body: “So long as the member was on the body, it lived; separated, it lost its life. Thus the man, so long as he lives on the body of the [Catholic] Church, he is a Christian; separated from her, he becomes a heretic” (Encyclical Satis cognitum of June 29, 1896).
Whoever leaves her [the Catholic Church] departs from the will and command of Our Lord Jesus Christ; leaving the path of salvation, he enters that of perdition. Whoever is separated from the Church is united to an adulteress” (ibid.). Certainly, they do not share with us the same title of Christian.
Pope Pius IX stated: “He who abandons the Chair of Peter on which the Church is founded, is falsely persuaded that he is in the Church of Christ” (Quartus supra of January 6 1873, n. 8).
In the Syllabus of Modern Errors, the proposition that Protestantism is nothing more than another form of the same true Christian religion was specifically condemned (Pius IX, n. 18)(1).
Therefore, there is only one Christian Church, the Catholic Church, and only those who belong to it should rightfully be called Christians.
Jesus told the disciples to come follow Him. Nothing about being Roman. Me thinks your popes need to read the Word also.
I'll Bet that Number Nine and Augustine are having so quite lovely discussions right now in heaven!
Your selections of quotes sound as though they were lifted from one of Mohammed Saeed al-Sahhaf’s press conferences.
That’s a nice list. Yet you posted you’re either catholic or you’re not. Perhaps you should have read your list first and then you would know what you are.