The Mystery of Godliness Is That Christ Is in You

Paul said in colossians that the mystery of godliness is that christ is in you. And my point is, i think we're trying a lot of times, in all our study and trying to figure out all the minor details of the bible. And paul is saying, i'm telling you the mystery. I'm solving the mystery. And it's a the lord jesus christ coming back. It's that the lord is living in you. All these simple things that he's calling a mis cause people can't wrap their head around there, like ointment. Now, now, how do i know all this bible's true, and how i don't know all