It is not true. If you hurt someone do you feel bad, or do you feel glee?
If you feel glee, and no tinge of remorse, than you are indeed a psychopath.
Having narcissistic tendencies, acting like a narcissist, is not being a narcissist / psychopath.
Psychopaths cannot stop being a psychopath.
Couldn't agree more. The mark of a psychopath isn't not being kind to others. It's being antisocial and remorseless. A psychopath doesn't believe that people around him have feelings; they're not really people, which is why a psychopath feels no remorse in using them or manipulating them.