“We declare, say, define, and proclaim to every human creature that they by necessity for salvation are entirely subject to the Roman Pontiff” ( D 478).
“Furthermore, we declare, we proclaim, we define that it is absolutely necessary for salvation that every human creature be subject to the Roman Pontiff.”2
“Furthermore, we declare, say, define, and proclaim to every human creature that they by necessity for salvation are entirely subject to the Roman Pontiff.” 3
“Furthermore, we declare, we proclaim, we define that it is absolutely necessary for salvation that every human creature be subject to the Roman Pontiff.” 4
“Now, therefore, we declare, say, determine and pronounce that for every human creature it is necessary for salvation to be subject to the authority of the Roman pontiff." 5
• Fordham University: absolutely necessary for salvation
• Wikipedia: absolutely necessary for salvation
• Catholic Encylcopedia: necessary for salvation
• Denzinger: by necessity for salvation
Porro subesse Romano Pontifici omni humanae creaturae declaramus, dicimus, definimus, et pronuntiamus omnino esse de necessitate salutis. 6
“To be a Christian it is normatively necessary to be a formal member of the Church Christ founded. This is the Catholic Church. And to be a formal member of the Catholic Church it is necessary to be formally subject to the earthly leader Christ established for it: the pope.
A Catholic thus might construct an argument for Unam Sanctam's definition like this:
1) To be saved it is necessary to be a Christian.
2) To be a Christian it is necessary to be a member of Christ's Church.
3) To be a member of Christ's Church it is necessary to be a member of the Catholic Church.
4) To be a member of the Catholic Church it is necessary to be subject to the Roman Pontiff.
5) Therefore, it is necessary for salvation to be subject to the Roman Pontiff.
In this argument, the necessities are all normative necessities and the kind of membership being discussed is formal membership. The argument has a logically valid form…meaning that the truth of its conclusion depends only on the truth of the premises it contains.” 8