Just remind that Jesus founded a Church, not a bible. He wrote nothing and commanded the writing of nothing. He said “He who hears you hears Me.” He established the Church as the final arbiter in all disputes. Oh, and He prayed for unity. Maybe link to the Didache, an authoritative letter written in the Apostolic age. Some held it to be scripture. It is perhaps the oldest catechism. All of the fundamentals are in it. Strangely enough, there is not a single peep about scripture, the “bible” or anything written.
No 16th century Euro-invention bible-based nonsense in there anywhere. Peter wrote of those who twist the scriptures and, irony of ironies, those who twist it the worst deny that they are twisting it.