Years ago Boyd K. Packer taught
True doctrine, understood, changes attitudes and behavior.
The study of the doctrines of the gospel will improve behavior quicker than a study of behavior will improve behavior. Preoccupation with unworthy behavior can lead to unworthy behavior. That is why we stress so forcefully the study of the doctrines of the gospel.
He reiterated it years later in another sermon:
Doctrine can change behavior quicker than talking about behavior will.
What doctrine, or better yet, Whose doctrine are you following?