The qualities associated with it are maternal solicitude and sympathy; the magic authority of the female; the wisdom and spiritual exaltation that transcend reason… On the negative side the mother archetype may connote anything secret, hidden, dark; the abyss, the world of the dead, anything that devours, seduces, and poisons
Jung’s foundational statement of the mother archetype’s ambivalent structure, encompassing both the nurturing and the devouring poles under the formula ‘the loving and the terrible mother.’
, The Archetypes and the Collective Unconscious, 1959thesis