Scientology Basics - The Parts Of Man
For the purposes of understanding an area it is helpful to break it down into parts so they can be studied separately. In Scientology we break a human being down into 3 parts.
When you look at a person you see the most obvious part - the body. But, this is not actually the most important part. The next part is the mind. Now, notice I don't say the brain, which is just another piece of meat. The mind is something else entirely, you can read all about it here: The Mind. Finally the most important of the three parts is what we call in Scientology, the Thetan. So what is a thetan? It could be called an awareness of awareness unit, because it is aware of being aware. It is the controller of the mind and body. Or a simpler definition is that it's you.
Another way to think of it is that it's the Scientology word for soul or spirit. But it is a slightly different concept: In other religions people say "I have a soul" as if it is something other than you, in Scientology we say "I am a thetan," because it's what you are.
For more data read this page: The Parts of Man.
Read this book:
Scientology - The Fundamentals of Thought (in 15 languages)
On Amazon: Scientology - The Fundamentals of Thought