Deciding what is God inspired

[Unveiled Artist]

You're thinking of the term "ex cathedra". I'm not an expert, but I'm not sure that the catholic church would consider papal statements made ex cathedra to have the same sort of authority as scripture, although they assert that in some sense they are infallible. Papal authority is a point of contention between eastern orthodoxy and the roman church, the EO tradition doesn't have any concept like ex cathedra, and wouldn't consider it possible for a single person to change the canon of scripture, although I think even in the roman church that is very unlikely that a Pope could do so effectively without consent from the church.

Yeah. I think that would be a very rare if the pope has the approval from the Church to add to scripture. Then you have the "in-betweens" I call them, when a Church teaching is not eplicitly in scripture but, because it is a Church tradition, it is based on scripture.

 

[Nakosis]

I think they use the letters of Paul to determine the doctrine of their religion. We are talking about the NT I'm assuming here.

So then using the authority of Paul they determined doctrine and the gospels which supported that doctrine.