In a full-fledged narcissist, the False Self imitates the True Self.
To do so artfully, it deploys two mechanisms:
It causes the narcissist to re-interpret certain emotions and reactions in a flattering, socially acceptable, light. The narcissist may, for instance, interpret fear as compassion. If the narcissist hurts someone he fears (e.g., an authority figure), he may feel bad afterwards and interpret his discomfort as empathy and compassion. To be afraid is humiliating - to be compassionate is commendable and earns the narcissist social commendation and understanding (narcissistic supply).
The narcissist is possessed of an uncanny ability to psychologically penetrate others. Often, this gift is abused and put at the service of the narcissist's control freakery and sadism. The narcissist uses it liberally to annihilate the natural defences of his victims by faking empathy.
This capacity is coupled with the narcissist's eerie ability to imitate emotions and their attendant behaviours (affect). The narcissist possesses "emotional resonance tables". He keeps records of every action and reaction, every utterance and consequence, every datum provided by others regarding their state of mind and emotional make-up. From these, he then constructs a set of formulas, which often result in impeccably accurate renditions of emotional behaviour. This can be enormously deceiving