The Geometry Of Divided Self names a cluster of concepts in depth psychology wherein spatial, mathematical, and structural metaphors — lines, planes, circles, triangles, coordinates — are deployed to map the interior split between opposing psychic agencies. The corpus does not treat this term as a settled doctrine but as a convergence zone where several distinct theoretical pressures meet. Edinger draws most explicitly on alchemical separatio, arguing that measurement, boundary-setting, and geometrical imagery all belong to the operation by which psyche differentiates itself — a process that can congeal into perpetual self-dissection when the rational intellect turns its blade upon the soul. McGilchrist approaches the same phenomenology neurologically: ‘morbid geometrism,’ the obsessive imposition of grid, symmetry, and segmentation upon living experience, marks the left hemisphere’s dominance and the consequent dissolution of felt selfhood into a ‘husk, a mechanism.’ Jung and Edinger together show that the mandala, the circle broken into triangles, and the quaternity all express the archetypal tension between wholeness and division — the self simultaneously as unity and as the dynamic of its own fragmentation. Welwood and the ACA tradition register the clinical aftermath: a subject split between observing and observed, the inward geometry of dissociation. The key tension throughout is whether geometrical division is a necessary instrument of individuation or a pathological substitute for lived integration.