Psychic inflation stands as one of the most clinically and culturally consequential concepts in the depth-psychological tradition. Jung introduced the term in ‘Two Essays on Analytical Psychology’ to name a specific condition: the extension of the personality beyond its individual limits through the appropriation of contents belonging to the collective psyche — archetypal energies, transpersonal powers, or the Self itself. The inflated ego occupies a space it cannot legitimately fill, whether by identifying upward with godlike attributes (omnipotence, omniscience, immortality) or, in the negative variant catalogued by Edinger, by collapsing inward in a corresponding deflation. Edinger systematized what Jung sketched, tracing inflation as the constitutive pathology of ego-Self non-differentiation and reading it into mythological, theological, and clinical registers simultaneously — from the Icarus myth to the concept of sin to the alcoholic’s grandiosity. Neumann located inflation in the ego’s identification with the persona and with collective moral values, exposing how ethical self-righteousness is itself a form of psychic overreach. Hillman, characteristically, subjected the concept to critical pressure, noting that ‘inflated’ had become a diagnostic weapon — ‘diagnosis as accusation’ — and tracing the term’s classical antecedent in hubris. Across these positions the central tension is consistent: inflation signals the failure to maintain the boundary between personal ego and suprapersonal psyche, whether the consequence is grandiosity, possession, or dissolution into the mass.