Start with the fact that everyone who reads the Bible interprets it a bit differently.
Then move on to the fact that we have so many, different, Christian denominations.
Why, if the meaning is so darn clear?
Then, ask yourself where the Bible EVER refers to the “Bible” -— it does not because it can’t, as no human who wrote the original words, in any Book, ever foresaw that Book being combined with OTHER Books, in any such fashion as the “Bible”.
The Bible is a tool.
The Bible is NOT an Idol to be worshiped.