Is There a Lack of Complexity in the Brain?

I don't see any lack of complexity in the brain. I think it's, you know, just about the most amazing thing that exists. So why wouldn't i use that to interpret these things? It's not as if a scientist doesn't have an awe inspiring experience,. Someone that believes and doesn't interpret it mystically doesn't haveAn amazing and beneficial experience. There isn't this need to assume that it's happening through some force other than the brain.