“Like travel, insomnia is an uprooting experience. You are torn out of sleep like a plant from its native soil, then shaken down so that any clinging vestige of slumber falls away, naked confusion exposed like nerve endings. Sleep, in its turn, is a matter of gravity. It pulls you down, beds you in the earth, burrows you in. In sleep you connect back to the bedrock that provides nourishment and restorative rest.”