"Yes, a narcissist is aware of his or her behavior, but unaware of the psychological mechanisms that compel and justify the behavior. Thus, an individual suffering from narcissistic personality disorder must be highly motivated to address the issue of compromised insight and introspection. If he or she is unwilling, the mistreatment of others may continue indefinitely." -Psychology Today

"Narcissists know that they are lying, but they often do so anyway, believing that it is best for them. This can create problems for both the narcissist and those around them. Lying can be an attempt to control others or bolster the narcissist's self-esteem. It can also be a way of covering up flaws or mistakes." - The Healthy Journal