Brain, specifically sapien's brain, is a stupendously marvelous machine. Or maybe it is not a machine at all, it is more than that. It has consciousness. For many decades, advocates of 'Artificial Intelligence' are saying that its just a matter of time when we'll be able to build machines that can 'think'. I argue they would never be able to do so.
Intelligence cannot be there without fathoming inherent understanding of the human thought process. And no computer has any awareness of what it does!
Morality is borne out of conscious beings, without it there would be only "Matsya Nyaya" or Law of the Jungle. Beauty, a platonic idea, would be meaningless without awareness. There must be something going on in the brain, that we have, not an iota of understanding of,
Our brain is a "conscious-complex adaptive system" based on grey principles of "chaos theory". When we can't even seem to predict weather which is directly a 'chaotic system' then how can we fully grasp our brains, which is many degrees higher in complexity?
I believe, if our brains were simple enough for us to understand then, I wouldn't be here writing this or even be "aware" that I have a brain!