Whatever we may say, all of us suffer from disturbed sleep at times.Some in truth hardly sleep, though some who sleep copiously swear that they do not.Some are disquieted by incessant dreams, and a fortunate few are visited often by dreams of delightful character.Some will say that they were at one time troubled in sleeping but have 'recovered' from it, as though awareness were a disease, as perhaps it is.
Gene Wolfe, The Claw of the Conciliator
sleep