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 Scientology: The Fundamentals of Thought.
This book really helped me with understanding the basics of life and knowing what man is and what holds him back from doing what he wants. It gave me a clear understanding of the fact that thought has power over all else.