Great post.
What many people might not understand, is many narcissists not only have rotten to the core character, but are habitual liars.
I have dealt with some extreme narcissist in my time and they are without a doubt mentally ill and can be quite dangerous.
We have one in the family by marriage. The damage has been enormous.
How true. I had a narcissist boss a few years ago. Always lying, almost always on the verge of raging. Glad I got out of there.