Erich Neumann
Author: Erich Neumann
Publisher: Princeton University Press (1954)

In relation to the ego, the mother image has both a productive and a destructive aspect, but over and above that, it preserves a certain immutability and eternality.  Although it is two-faced and can assume many shapes, for the ego and consciousness it always remains the world of the origin, the world of the unconscious.  In general, therefore, the mother represents the instinctual side of life, which, compared with the changing positions of the ego and consciousness, proves to be constant and relatively unalterable, whether it be good or bad, helpful and productive, or hurtful and terrible.