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 Clear Body, Clear Mind.
This book really cleared up for me how all sorts of drugs and toxins we consume every day can have a cumulative negative effect on the ability of people to operate. We live in a very chemical-oriented society; I think people are only now beginning to be aware of the power of the negative impact drugs and toxins have on our lives and general productivity and happiness.