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 Science of Survival.
This book tells about emotions and how they play such a big role in all the relationships that we live. It explains what to expect from a person who is momentarily experiencing a certain emotion (as well as what to do and NOT to do around people when they are upset!) and it also explains the many ways to improve one's emotional outlook on life in general, how to feel good!