And when he was done he had built a haven for himself.
what was the purpose of building that heaven?
He wanted to be the lone ruler in the world, so he dug a hole and build a haven to protect him from the outside.
It's a good story. So I think the lesson we can learn from it that it's good to be self-sufficient in order to protect ourselves.
No, it's more about dealing with extreme situations.
Well being self-sufficient also helps with extreme situations. So it is still good to be so.