the thetan is an energyunit which is located in the center of the skull. It is conceived to be small but is as large as the preclear believes it to be. A thetan who cannot leave the current body very often believes himself to be holding on only to the current body, and yet in actuality is holding on to a facsimile of an earlier body. The thetan also believes himself to be the size of some earlier body. A thetan from the Fifth Invader Force believes himself to be a very strange insect-like creature with unthinkably horrible hands. He believes himself to be occupying such a body, but is in actuality simply a unit capable of producing space, time, energy and matter. —LRH, 8-8008 - Scientology 8-8008 Glossary Final approval c. 3 Mar 1990