What is so mysterious about human consciousness?

[napoleon_in_rags]

30. Yes, but which one is YOURS?

And what defines it as yours*? You are saying a perfect copy of your consciousness wouldn't be yours, and why is that? It must be because your consciousness is tied not any specific configuration of brain or molecules that make it up, but rather to the specific atoms that make up YOUR brain. That means were those atoms to be replaced, an identical person would replace you, who would have the same memories and act in all the same ways, but not be you*. This is a difficult reality.

* when I say "you", I mean not from the perspective of external observers, but "you" from the perspective of yourself. For instance imagine one day you woke up in bed, and were John Malkovich. Meanwhile your current body was under the control of an imposter who acted just like you. "you" are now John Malkovich from your own perspective, but not from external observers who think you haven't changed.