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.
I have recommended this book because for me it gave me my first understanding of why some things I already knew to be true or untrue were that way. It began my path to knowledge of myself and of my fellows.