" In hospital they ask you to rate your discomfort on a scale of ten. I guess it’s the best they can come up with, but it fails to capture the nature of the beast. Pain can stay the same while you change around it. And, like a thumb of constant size, what it blocks out depends on how close it gets to you. At arm’s length a thumb obscures a small fragment of the day. Held close enough to your eye it can blind you to everything that matters, relegating the world to a periphery. "

― Mark Lawrence , One Word Kill (Impossible Times #1)