"It is clear that this Roman Church is to all churches throughout the world as the head is to the members, and that whoever separates himself from it becomes an exile from the Christian religion, since he ceases to belong to its fellowship." (Pope Boniface I, Epistle 14, 5th century).
"Now the holy Church universal proclaims that God cannot be truly worshipped saving within herself, asserting that all they that are without her shall never be saved." (Pope St. Gregory the Great,
Moralia, 590-604).
"We are compelled in virtue of our faith to believe and maintain that there is only one holy Catholic Church, and that one is apostolic. This we firmly believe and profess without qualification. Outside this Church there is no salvation and no remission of sins, the Spouse in the Canticle proclaiming: 'One is my dove, my perfect one. One is she of her mother, the chosen of her that bore her' (
Canticle of Canticles 6:8); which represents the one mystical body whose head is Christ, of Christ indeed, as God. And in this, 'one Lord, one faith, one baptism' (Ephesians 4:5). Certainly
Noah had one ark at the time of the flood, prefiguring one Church which perfect to one cubit having one ruler and guide, namely Noah, outside of which we read all living things were destroyed… We declare, say, define, and pronounce that it is absolutely necessary for the salvation of every human creature to be subject to the Roman Pontiff." (Pope Boniface VIII,
Unam Sanctam, 1302).
"The most Holy Roman Church firmly believes, professes and preaches that none of those existing outside the Catholic Church, not only
pagans, but also
Jews and
heretics and
schismatics, can have a share in life eternal; but that they will go into the "eternal fire which was prepared for the devil and his angels" (Matthew 25:41), unless before death they are joined with Her; and that so important is the unity of this ecclesiastical body that only those remaining within this unity can profit by the sacraments of the Church unto salvation, and they alone can receive an eternal recompense for their fasts, their almsgivings, their other works of Christian piety and the duties of a Christian soldier. No one, let his almsgiving be as great as it may, no one, even if he pour out his blood for the Name of Christ, can be saved, unless he remain within the bosom and the unity of the Catholic Church." The same council also ruled that those who die in original sin, but without mortal sin, will also find punishment in hell, but unequally: "But the souls of those who depart this life in actual mortal sin, or in original sin alone, go down straightaway to hell to be punished, but with unequal pains." (Council of Florence,
Cantate Domino, 1441).
"You know how zealously Our predecessors taught that very article of faith which these dare to deny, namely the necessity of the Catholic faith and of unity for salvation. The words of that celebrated disciple of the Apostles, martyred Saint Ignatius, in his letter to the Philadelphians are relevant to this matter: 'Be not deceived, my brother; if anyone follows a schismatic, he will not attain the inheritance of the kingdom of God.' Moreover, Saint Augustine and the other African bishops who met in the Council of Cirta in the year 412 explained the same thing at greater length: 'Whoever has separated himself from the Catholic Church, no matter how laudably he lives, will not have eternal life, but has earned the anger of God because of this one crime: that he abandoned his union with Christ' (Epsitle 141). Omitting other appropriate passages which are almost numberless in the writings of the Fathers, We shall praise Saint Gregory the Great, who expressly testifies that this is indeed the teaching of the Catholic Church. He says: 'The holy universal Church teaches that it is not possible to worship God truly except in her and asserts that all who are outside of her will not be saved' (Moral. in Job, 16.5). Official acts of the Church proclaim the same dogma. Thus, in the decree on faith which Innocent III published with the synod of the Lateran IV, these things are written: 'There is one universal Church of the faithful outside of which no one at all is saved.' Finally, the same dogma is expressly mentioned in the profession of faith proposed by the Apostolic See, not only that which all Latin churches use (Creed of the Council of Trent), but also that which the Greek Orthodox Church uses (cf. Gregory XIII, Profession 'Sanctissimus') and that which other Eastern Catholics use (cf. Benedict XIV, Profession 'Nuper ad Nos')… We are so concerned about this serious and well known dogma, which has been attacked with such remarkable audacity, that We could not restrain Our pen from reinforcing this truth with many testimonies." (Pope Gregory XVI,
Summo jugiter studio, 1832).
"This is our last lesson to you; receive it, engrave it in your minds, all of you: by God's commandment salvation is to be found nowhere but in the Church." (Pope Leo XIII,
Annum Ingressi, 1902).
"Some reduce to a meaningless formula the necessity of belonging to the true Church in order to gain eternal salvation." (Pope Pius XII,
Humani Generis, 1950).
""They could not be saved who, knowing that the Catholic Church was founded as necessary by God through Christ, would refuse either to enter it, or to remain in it." (Vatican II,
Lumen Gentium, 1964).