QUOTE : A notable difference between normal narcissistic personality disorder and malignant narcissism is the feature of sadism, or the gratuitous enjoyment of the pain of others. A narcissist will deliberately damage other people in pursuit of their own selfish desires, but may regret and will in some circumstances show remorse for doing so, while a malignant narcissist will harm others and enjoy doing so, showing little empathy or regret for the damage they have caused.