If you want to find out more about Dianetics and Scientology, the best way to do this is to read an L. Ron Hubbard book on the subject. I personally recommend you read Dianetics: The Modern Science of Mental Health.
This book really helped me with dissecting life into it's component parts. Thus it makes clear the workings of an individual's life, highlighting areas of weakness, and how to strengthen these parts. It contains both the theories of explaining, defining, and identifying aspects of life, and the practical processes to improve these aspects.