" He saw no reason to doubt that his shadow dreamed just as he did for the reason that he could imagine himself to be a shadow of something - someone - else and that perhaps even his sleep, his dreams, constituted his duty as a shadow of someone else and that perhaps while THAT someone else dreamed, he was free to live his waking life, so that this alternating, interdependent series of lives formed a sort of intaglio; the waking day of each shadow was the opposite side of its possessor's sleep. "

― Paul Harding