“Those who acknowledge Christ must acknowledge Him completely and entirely. The Head is the only-begotten Son of God; the Body is His Church. No one can in any way be counted among the children of God unless they take Jesus Christ as their Brother and, at the same time, the Church as their Mother. Christianity is, in fact, incarnate in the Catholic Church; it is identified with that perfect spiritual society which is the Mystical Body of Jesus Christ and has for its visible head the Roman Pontiff. Consequently, all who wish to reach salvation outside the Church are mistaken as to the way and are engaged in a futile effort. This is our last lesson to you; receive it, engrave it upon your minds, all of you: by God’s commandment salvation is to be found nowhere but in the Church.”
POPE LEO XIII
“The Catholic Church alone is the Body of Christ, of which He is Head and Savior. The “People of God” and the “Mystical Body of Christ” are one and the same thing, both of them designating the Church. Membership in the Church requires conditions other than Baptism alone; it requires identical faith and unity of communion, so that by means of the Catholic Church alone, which is the unrestricted instrument of salvation, is it possible to obtain the fulness of the means to salvation. Indeed, the Church is both a sure and an exclusive means of attaining salvation. We must always remember the unity of the Mystical Body outside which there is no salvation, for there is no entering into salvation outside the Church. Outside this Body, the Holy Spirit gives life to no one: those who are enemies to unity do not participate in the charity of Divine Life; those outside the Church do not possess the Holy Spirit. The entrance to salvation is open to no one outside the Church!”
POPE PAUL VI
“The Holy, Catholic, Apostolic, Roman Church is the only true Church of Jesus Christ. It is error to believe that men can find the path of eternal salvation and attain eternal salvation in the practice of any religion whatsoever. It is error to believe that Protestantism is nothing other than a different form of the same true Christian religion, in which it is permited to please God equally as in the Catholic Church.”
Ven POPE PIUS IX
Is the question answered here?