in fight club, he was tired all the time because during the times he thought he was sleeping, he was awake as tyler durden.
i am tired all the time because when i'm sleeping, i'm having these dreams where i'm having interactions with people that demand attention. maybe fight club was about a manifestation of an other on the same plane. maybe we manifest just as substantial others on different ones. all i know is, i seem to find the people i meet later on, in those dreams.