In Islam, the believer is permitted to lie to the non-believer because the believer has the greater truth. For the moral narcissist, lies becomes truth in almost the same manner. Some like Dan Rather (a moral narcissist par excellence) could thus pronounce the Bush National Guard papers real when anyone with an IQ in triple digits could see that they were fake. They felt real to Dan. And, crucially, that made him feel good about himself.
