Yes I think I can explain it to a five year old. By explaining that the Bible is God’s word to us. And He gave us everything we would need in order to be with Him in Heaven one day. And then we would sing Jesus Loves Me. And so it would go through the years, learning God’s word. Growing in the Scriptures. So as not to be tossed to and fro by every wind of doctrine.
So far that’s how I would proceed — did proceed! Well I started by saying that God loved her, loved her better than I did. But there’s nothing in what you said so far.that contradicts Paul’s being a priest in the Catholic Church.