The DSM does not provide a clear "threshold" or "critical mass" beyond which the subject should be considered mentally ill.

Laymen often confuse and confute "personality" with "character" and "temperament".

Personality disorders are like tips of icebergs.

The narcissist lacks empathy. He is, therefore, unable to meaningfully relate to other people and to truly appreciate what it is to be human. Instead, he withdraws inside, into a universe populated by avatars - simple or complex representations of parents, peers, role models, authority figures, and other members of his social milieu.

Narcissists invariably react with narcissistic rage to narcissistic injury.