We set up boundaries between creatures, define concepts like life and death because they allow us to understand and predict the world better. I think that's wh

We set up boundaries between creatures, define concepts like life and death because they allow us to understand and predict the world better. I think that's what "eating the fruit of the tree of knowledge" means. If the universe is unity, when you die, the universe is still here. As Christians put it, "One with God". If you see yourself as separate to the universe, when you die, you're dead. And Hell = consumed by ego, which likes comparing you and others. That's going into philosophy, and it's useful in so far it helps people feel content.