“Trinity”, “Sola Scriptura” and, to a lesser degree, “ever virgin” are mere labels. Sometimes their meaning is clearly sufficient enough for the phrase to fairly completely “mean what it says”. Ever virgin does that. It means, basically, that the person to which it is applied never had sex in their entire life. The other two are deep with subtle meaning and, on their own, don’t mean much unless used in the company of like minded people on the subject. That is, the word “Trinity” is used by one group to mean one thing while used by another to mean something similar, but different.
I will say this: I’ll take the bible as gospel before I will believe any man, simply due to his title. It is not only my right, but as a Christian it is also my responsibility. But I do understand that this is not the Catholic way. They believe, like the Mormons, that their leaders are placed by God and to be honored and believed accordingly. I think Islam does that too, come to think of it. As for me, I believe the believers are the “Church” and gather together in His name. It is, like the apostles, a loosely formed organization. It brings its own problems, e,g, Judas, but the rewards are greater.
the difference is unlike the Mormons or Islam, Jesus established the Catholic Church. Tell me, what authority on earth has the power to proclaim which books are canonical and which ones aren’t? is there one? if not, how do we know we have the correct Bible?