Narcissist or Psychopath? What Are the Differences?

As opposed to most narcissists, psychopaths are either unable or unwilling to control their impulses or to delay gratification. They use their rage to control people and manipulate them into submission. Psychopaths, like narcissists, lack empathy but many of them are also sadistic: they take pleasure in inflicting pain on their victims or in deceiving them. They even find it funny! (From the book "Malignant Self-love: Narcissism Revisited" by Sam Vaknin - Click on this link to purchase the print book, or 16 e-books, or 2 DVDs with 12 hours of video lectures on narcissists, psychopaths, and abuse in relationships: http://www.narcissistic-abuse.com/thebook.html)