I have started this thread so I can understand why people can not understand why mormons believe in more of God’s word than other mainstream Christians. And why others can not accept that there is more of God’s word. We are asked why we believe in these books. I ask how do you know that what you believe in is real or more correct than what I have. History is fine, but victors always write the histroy.
For a couple reasons.
Why we don’t add more books: First, we believe in a Trinitarian God who created all things which exist (which I believe is slightly different than the Mormon idea), and we believe that Jesus is God, and is the Word of God.
That is, Jesus is the perfect Word of the Father, and so He has nothing else to say. Public revelation ended with Christ, because Christ is Truth, and once you have Truth itself there can be nothing else to gain. (Our
understanding can deepen, of course. We can learn things we did not know based on what was told us, but this is not new revelation - simply what happens as we process what was given to us. But we have been given Everything.)
This is more or less a paraphrase of a CCC passage which I am trying to remember and having a hard time tracking down, I will reference if I find it though, as I’m sure it says it better than I can.
As to why we accept the books we have (addressing the point you made, there is more): it’s fine to say that victors write history, but we tend to believe that when it comes to safeguarding the truth He wishes us to know, God makes sure the victors (in this sense) are who He wishes them to be. We only have the history we have, and we believe in a God who could make sure that it turned out to be the way He wishes it to. So if God had revealed Himself to us, and if He desired that revelation to stay with us after He made it (which, given that He went to trouble to make it, I think is a reasonable assumption), then He would make sure such happened.
You could of course take the question a step further back and ask why we believe that Jesus had anything to do with God whatsoever, bringing up the possibility that Jesus was just a man who started an early movement that went viral for some reason. That is, you could ask why we think the victors are writing about something God did and hence that God would have an interest in preserving their integrity, rather than just people perpetuating something close to mythology. And there would be answers, but I think that would be to veer from the original subject a bit.