Terry Pratchett said this quote

“ Susan stared at him.The blue glow in Death’s eyes gradually faded, and as the light died it sucked at her gaze so that it was dragged into the eye sockets and into the darkness beyond……which went on and on, for ever. There was no word for it. Even eternity was a human idea. Giving it a name gave it a length; admittedly, a very long one. But this darkness was what was left when eternity had given up. It was where Death lived. Alone. ”