Pope Boniface VIII in his famous "Unam sanctam" (1302) spoke strongly: "Outside of which (the Church) there is neither salvation nor remission of sins. . . . But we declare, state and define that to be subject to the Roman Pontiff is altogether necessary for salvation."

So THIS is where Mormons got it from!!!

In conclusion let us summarize this grand key, these “Fourteen Fundamentals in Following the Prophet”, for our salvation depends on them.

1. The prophet is the only man who speaks for the Lord in everything.
2. The living prophet is more vital to us than the standard works.
3. The living prophet is more important to us than a dead prophet.
4. The prophet will never lead the church astray.
5. The prophet is not required to have any particular earthly training or credentials to speak on any subject or act on any matter at any time.
6. The prophet does not have to say “Thus Saith the Lord,” to give us scripture.
7. The prophet tells us what we need to know, not always what we want to know.
8. The prophet is not limited by men’s reasoning.
9. The prophet can receive revelation on any matter, temporal or spiritual.
10. The prophet may advise on civic matters.
11. The two groups who have the greatest difficulty in following the prophet are the proud who are learned and the proud who are rich.
12. The prophet will not necessarily be popular with the world or the worldly.
13. The prophet and his counselors make up the First Presidency—the highest quorum in the Church.
14. The prophet and the presidency—the living prophet and the First Presidency—follow them and be blessed—reject them and suffer.

I testify that these fourteen fundamentals in following the living prophet are true. If we want to know how well we stand with the Lord then let us ask ourselves how well we stand with His mortal captain—how close do our lives harmonize with the Lord’s anointed—the living Prophet—President of the Church, and with the Quorum of the First Presidency.

Ezra Taft Benson

(Address given Tuesday, February 26, 1980 at Brigham Young University) http://www.lds.org/liahona/1981/06/fourteen-fundamentals-in-following-the-prophet?lang=eng

The Catholic Church is also where the Mormons got the OT and the NT. But it was from the Protestants that they got the idea that they could subtract several books. Ver-r-r-r-r-y inter-r-r-r-resting.

The idea that if Christ has founded a church, you'd better be in it, makes logical sense on the face of it. The question would be: which church? And how can you tell?

From the Catholic point of view, the idea that God will not hold you morally culpable for non-church-membership if you were "invincibly ignorant" (you lacked sufficient knowledge) also makes logical sense on the face of it. Do you know if the Mormons teach that?