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: A New Slant on Life.
This book really helped me with all sorts of things. I especially liked the chapters called "Happiness and Interest" and "What is Greatness." You'll see what I mean when you read 'em.