The Mind is Concious But Conscious of Nothing

"I said to my soul, be still, and let the dark come upon you
Which shall be the darkness of God. As, in a theatre, 
The lights are extinguished, for the scene to be changed
With a hollow rumble of wings, with a movement of darkness on darkness,
And we know that the hills and the trees, the distant panorama
And the bold imposing facade are all being rolled away—
Or as, when an underground train, in the tube, stops too long between stations
And the conversation rises and slowly fades into silence
And you see behind every face the mental emptiness deepen
Leaving only the growing terror of nothing to think about;
Or when, under ether, the mind is conscious but conscious of nothing—" 

                                    -From T.S. Eliot's "East Coker" of Four Quartets