Is your mind whispering things that you do not identify as coming from within? Has the whispers of negative forces become so central in your life, that you mistake that negativity for reality?
The first step to knowing what is and is not really you, is to listen. Quiet your mind and wait for what you hear.
Do your thoughts feel good? Do they support your past behavior or are they completely out of character?
If your thoughts are the opposite of what you believe or how you behave, that is cognitive dissonance. In psychology, cognitive dissonance is the act of having inconsistent thoughts, beliefs, or attitudes that contradict who you really are. This is why the first step is to know who you really are and what legacy you want to leave behind.