Within the depth-psychology corpus, the number seven occupies a position of unusual density and ambivalence. It is simultaneously a cosmological structure, an initiatory marker, an alchemical index, and a numerical threshold on the way to totality. Jung identifies the ‘seventh’ with the highest stage of illumination in initiation traditions, while Edinger elaborates the seven planetary spheres as a ladder between earth and the fixed stars — seven being the penultimate rung before the eighth, which represents achieved totality. Von Franz, working through the Aurora Consurgens, maps seven onto the alchemical metals and planets, the seven parables of the opus, and the step between three-and-four doubling that marks the approach to the inferior function. Hamaker-Zondag traces the paradoxical history of seven as an unlucky Babylonian number transformed into a sacred one, noting its composite structure as three-plus-four. Nichols and Pollack, writing from Tarot hermeneutics, associate seven with fate, struggle, and the crossing of a threshold. Eliade grounds the number in shamanic cosmologies of seven heavens. What unites these divergent treatments is a shared intuition: seven is not a completed state but a transitional one — the penultimate moment before integration — making it a privileged site for tracing the individuation process across symbolic traditions.