Susan Weitzman said this quote
“ But if he is angry at the world for doing him harm, why does he take it out on his loving partner? Couldn’t he just as readily express his rage by playing racquetball or pounding pillows. His ideas about her role seem paradoxical. On the one hand, the narcissistic husband has vested his wife with tremendous power. She is necessary for his self-repair, but instead of valuing her and seeking comfort in her arms, he beats and humiliates her. Because he sees her as available to meet any and all of his needs, he releases his rage and any self-hate at her; such an act helps him ultimately feel powerful again, making him realize he is not weak and shattered.When the narcissistic man eels the terror and rage associated with his own internal fragmentation, his outburst restores his sense of power and control. He turns the anger expanding within him away from himself, toward his wife. He insists that she’s the defective one, she’s to blame, because she has not met his needs. Such acts of externalization are key to the NPD batterer. His violent behavior restores his self-esteem. He believes that his actions are not his fault; he is just trying to take care of himself. ”