Solutio occupies a distinctive position in the depth-psychological appropriation of alchemical symbolism, functioning as both an operative procedure and a governing metaphor for the ego’s encounter with dissolving forces larger than itself. Edinger, whose treatment in Anatomy of the Psyche remains the locus classicus for the term within this corpus, frames solutio as the liquefaction of fixed psychic structures—the reduction of hardened attitudes, identifications, and developmental arrests to a more fluid, regenerable prima materia. The operation carries an irreducible ambivalence: dissolution may signify regression, psychic drowning, and loss of form, yet it is simultaneously the precondition for transformation and new life. Edinger distinguishes lesser from greater solutio, the former involving partial loosening through love, lust, or therapeutic immersion, the latter constituting a numinous encounter with the Self in which whatever is inauthentic in the ego is melted down. Moore, reading Ficino through alchemical lenses, situates solutio within the dialectical motto solve et coagula, insisting that the soul requires both dissolution and consolidation to avoid the twin pathologies of literalism and inflation. The operation’s symbolic field is vast—flood mythology, baptism, dismemberment, the mercurial bath, and the lunar dissolution of solar rigidity all fall within its compass. Tension exists throughout the corpus between solutio as therapeutic necessity and as mortal danger, a tension the tradition negotiates through the ego’s orientation toward the Self.