Sleeping by the Mississippi--photographs by Alec Soth
"Over and over again I fall asleep with my eyes open, knowing I'm falling asleep, unable to prevent it. When I fall asleep this way, my eyes are cut off from my ordinary mind as though they were shut, but they become directly connnected to a new, extraordinary mind which grows increasingly competent to deal with their impressions."

Charles Lindbergh, writing about the twenty-second hour of his transatlantic flight in The Spirit of St. Louis.