The human mind, when you really take the time to think about it, is an amazing thing. It evolved, from a few cells whose purpose was to use past experiences to anticipate future problems to an organ capable of controlling vital functions without its creating even being aware of it. One malfunctioning piece, though increasing vulnerability, does not necessarily bring about its end.
In fact, we humans can alter our brains if we want. We can learn new information to use, we can communicate with others, we can teach ourselves ways around the mental road blocks we are all built with. From our brains we have created beauty, learned about the quantum foam of the universe, carved out cities that outlast their inhabitants by centuries. All this from a few cells, from a unicelled organism, from some amino acids, from random proteins, from primordial ooze, from high energy, self-replicating molecules, from molecular gas collapsing into a star, from gravity constantly pulling things and making them interact with each other.
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