Within the depth-psychological corpus, Isis occupies a position of remarkable density and ambivalence. She is simultaneously the paradigmatic figure of devoted, resurrective love — the goddess whose tears flood the Nile and whose tenacious quest reassembles the dismembered Osiris — and a figure whose ‘terrible’ underside Neumann insists must not be glossed over: her misdirected spear striking Horus, her lethal gaze annihilating the child of Astarte, her witchcraft barely suppressed beneath the ‘good Egyptian Isis’ of official mythology. Campbell reads her as humanity’s projection of grief, courage, and maternal devotion made divine, drawing her parallel to Demeter as an earthward movement of the sacred feminine. Von Franz locates her at the origin of alchemical transmission itself — as the prophetess who extracts cosmic secrets from angels, embodying matter, nature, and the anticipatory function of the unconscious; her late-antique supremacy, absorbing all other deities into herself, prefigures the Catholic elevation of the Virgin. Jung and his school treat her mythological repertoire — widow, mother of Horus, mistress of magical knowledge — as symbolic infrastructure for understanding the coniunctio, individuation, and the prima materia. The Isis-Osiris cycle thus functions in the corpus as a template for transformation, death-and-resurrection symbolism, and the dialectic between matriarchal and patriarchal psychic orders.