I do not know about all the Christian churches you did not put on the list, and yet, I find that there is a big difference between the teachings of the ones I know. There must be one or more teachings that follow through all of them that makes them proper, even though the rest of the teachings differ. Please tell me what that teaching is. Thank you.I believe that they all teach that the Earth is round and that it revolves around the Sun. They all teach that George Washington was the First President. They all teach that the Pope is Catholic and that bears _ _ _ _ in the woods.