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 understanding why I would get angry and depressed sometimes and why others are angry and depressed somtimes. It showed that there is hope and help. It also showed me that there are no limitations to what you can achieve.