Christianity is together - God's Word ALONE brings them together.
It is written: "'As surely as I live,' says the Lord, 'every knee will bow before me; every tongue will confess to God.'" Romans 14:11
So then, each of us will give an account of himself to God". Romans 14:12
NOTICE It is Written which means HIS WORD - not man made teachings. And an account of 'himself' and not a church or what it taught!
Excuse me, do you think there is something magical about writing things down?
We have already established Luke 2 proves God's word is more than just what is written in the Bible.