Consider this thought:

I have discovered both the punishment and the cure for Narcissism. They are both the same.

They are to be placed in a 6 x 6 room with a bed, a sink and toilet only. This room's walls will have no windows and nothing on them. They will be 100% reflective. They are to have no sound other than music. The only means of escape they are to be given are objects and activities that promote introspection. They are to remain in this room until they can express true empathy.

Trust me, it won't take long.