How do we know which books are God’s books? Who ‘decided’ which books are in the canon? Who ‘chose’ the canonical books? Dr. Mike Kruger with an excellent post on this vital question: http://michaeljkruger.com/ten-basic-facts-about-the-nt-that-every-christian-should-memorize-early-christians-believed-that-canonical-books-were-self-authenticating/