Dianetics is considered the foundation of Scientology but Scientology is much bigger than Dianetics.
The basis of Dianetics is that we’re Spiritual beings having a human experience. Part of being human is experiencing pain and trauma.
These traumatic experiences (most of them from when we’re younger and when the subconscious mind is more exposed) leave us with scars that are “covered up” by the mind to stop the pain. Scientology refers to these scars as Engrams.
The more of these engrams someone has the less capable they are of operating at their maximum potential.
As they are removed a person becomes more aligned with his/her spiritual self.
A big part of Scientology is going thru the process of identifying these engrams and then eliminating them.
When someone has removed all of their engrams they are considered to be “Clear”.
Scientologist that reach “clear” have access to more of their intuitive, mental and spiritual faculties. They also have less health issues and age much slower in my personal observation.
I’ll add that I am not a Scientologist, I’m just someone who’s curious about human potential that came across Scientology and studied it for a little while.
From what I’ve seen and observed they have some great pragmatic principles on approaching life and success.