The Parts of Man
Man consists of three parts. The first of these is the spririt, called in Scientology the thetan (from the Greek letter theta, meaning "thought" or "spirit"), which is the individual himself.
The second of these parts is the mind. The thetan uses his mind as a communication and control system between himself and his environment.
The third of these parts is the body. The body is not the person.
The most important of the three parts of man, as L. Ron Hubbard discovered, is the thetan, which is the spirit, or you.