It's not just a metaphor, also not just a history text or a news report, but some mysterious third thing: a metaphysical story. It take place on Earth, but also transcends it. It tells us about the relationship between the Old and New Israelites and God, and it is a completely true story, in a way that no other story can be true.
I just take everything at face-value and extract deeper, profound meaning from it. Everything written in there was guided by the Holy Spirit and only the Truth can come from the Spirit.