The invulnerability of soul occupies a charged position across the depth-psychology corpus, moving between cosmological assertion, psychological aspiration, and critical interrogation. In Plotinus, the claim is metaphysical: the All-Soul, sovereign over the body it contains, cannot be bound by what it itself has bound, and the soul’s life is self-springing, essential, immune to external destruction. Plato’s Phaedo presses a logical corollary—the soul, bearing life as its essential attribute, cannot receive death’s opposite. Gregory of Nyssa transposes this into Christian anthropology, envisioning the resurrection as a return to an original invulnerable form before evil’s inroad. These are affirmative positions. A sharper tension appears in Hillman, who identifies the desire for invulnerability as a characteristic demand of puer consciousness and the son archetype: the wish for maternal protection, existential guarantee, and immunity from risk—precisely what forecloses the spirit that comes from uncertainty and failure. Nussbaum, reading Lucretius, diagnoses the frenzied human search for invulnerability as itself self-defeating, pressing aggressive stratagems that produce destruction. Armstrong’s account of yogic achievement offers an intermediate register: a practical, cultivated invulnerability attained through disciplined meditation—real but bounded. Edinger’s alchemical reading of Shadrach, Meshach, and Abednego as immune to fire locates the motif within calcinatio and Self-motive. Eliade indexes invulnerability among shamanic attainments. Together, the corpus traces a continuum from ontological ground to pathological defense.