Knut Hamsun said this quote
“ I opened my eyes; how could I keep them shut when I could not sleep? The same darkness brooded over me; the same unfathomable black eternity which my thoughts strove against and could not understand. I made the most despairing efforts to find a word black enough to characterize this darkness; a word so horribly black that it would darken my lips if I named it. Lord! how dark it was! and I am carried back in thought to the sea and the dark monsters that lay in wait for me. They would draw me to them, and clutch me tightly and bear me away by land and sea, through dark realms that no soul has seen. I feel myself on board, drawn through waters, hovering in clouds, sinking--sinking. ”