But the other side of the Terrible Father, who thwarts the son and hinders his self-development, is spiritual rather than phallic. Just as in Barlach's Der Tote Tag the terrible Earth Mother prevents her son from becoming a hero and thus "castrates" him, so there is a Terrible Father who castrates the son by not letting him achieve self-fulfillment and victory. Once again, this father is transpersonal. He acts, as it were, like a spiritual system which, from beyond and above, captures and destroys the son's consciousness. This spiritual system appears as the binding force of the old law, the old religion, the old morality, the old order; as conscience, convention, tradition, or any other spiritual phenomenon that seizes hold of the son and obstructs his progress into the future. Any content that functions through its emotional dynamisms, such as the paralyzing grip of inertia or an invasion by instinct, belongs to the sphere of the mother, to nature. But all contents capable of conscious realization, a value, an idea, a moral canon, or some other spiritual force, are related to the father-, never to the mother-system. Patriarchal castration has two forms: captivity and possession.
— Erich Neumann
Neumann is describing something most people experience as conscience. The old law, the old morality, the binding force of tradition — these feel like inner convictions, even like integrity. That is precisely what makes them so effective as castrating agents. They do not arrive as external commands; they arrive as what you already believe, as the voice that sounds most like you.
The distinction he draws between mother-system and father-system is worth pressing: whatever operates through emotional flooding, through the body's sudden weight, through paralysis — that belongs to the mother-archetype. But whatever arrives as a value, an idea, a spiritual requirement, a sense of what the good man ought to do — that is the father-system, even when it wears the face of God. Especially when it wears the face of God. The two forms Neumann names — captivity and possession — are not sequential stages but simultaneous pressures. Captivity is knowing the old order holds you and being unable to move; possession is no longer knowing it holds you because you have become its voice. The possessed son is not a prisoner who can be freed; he is the warden who has forgotten he was ever a prisoner. That collapse of distance between self and system is where the castration completes itself, not in the father's prohibition but in the son's identification with it.
Erich Neumann·The Origins and History of Consciousness (Princeton·2019