It is a way of avoiding a grave prospective narcissistic hurt brought on by being abandoned. The narcissist, it seems, is ever the hurt child. The narcissist anticipates his abandonment and, paradoxically, by trying to avoid it, he precipitates it. The narcissist is devoid of empathy and incapable of intimacy with others as well as with himself. To him, lying has become a second nature.
Ego soon takes over.
He begins to believe his own lies. He makes himself to be what he wants to be and not what he is. So, he measures life by events, difficulties, negative externalities and predictions and projections related to them. His predisposition would be to maintain asymmetric relationships, wherein he both maintains and displays his superiority. He is forever patronising, condescending, patronizing, forgiving, or patiently teaching.