Julien expressed an interesting theory, that is, human behavior can be altered by a ‘flinch.’ A flinch being the right negative force that drives a person to go in the direction intended. If a person know and understand the negative consequences, s/he will be compelled by instinct to change. When the subconscious know that it will be hurt by an action, it will resist that action.
He teaches that a person who wants to quit a bad habit can associate the habit with the negative hurting consequences. In this was the person will be compelled not to do it. In the say way a good habit can be formed by informing the mind of the negative hurting consequences of not taking the good actions.
The book is a good read, but I would not advise a person to follow all the teachings blindly. It sounds like a violent method of bringing change.