" And now all those brain cells are dead – and my mother – who in a sense was the complex electrochemical interaction of all these millions of neurons – is no more. In neuroscience it is called ‘the binding problem’ – the extraordinary fact, which nobody can even begin to explain, that mere brute matter can give rise to consciousness and sensation. I had such a strong sensation, as she lay dying, that some deeper, ‘real’ person was still there behind the death mask. "

― Henry Marsh , Do No Harm: Stories of Life, Death and Brain Surgery