Faith comes through hearing.
Roman chapter 10.
The church has teaching authority. Bible alone is a Protestant tradition.
Remember that we compiled the canon of the Bible from all of the books floating around claiming to be scripture. There is no list of books in the Bible itself. You already rely on the teachings of the Catholic Church by referring back to our book.
LOL @ “..:books floating around..:”
You people!
Therefore, bible alone is not enough.