Within the depth-psychology corpus, ‘tongue’ operates simultaneously as anatomical organ, cosmogonic instrument, and psychopathological marker. The range of positions is striking. At one pole, the tongue figures as the executive agent of divine logos: Egyptian theology, particularly the Memphite theology of Ptah, locates creation itself in the tongue’s repetition of the heart’s thought, a formulation that Campbell and von Franz both treat as a psychologically resonant prototype of the logos principle. At another pole, von Franz reads the tongue’s negative valence — the slanderous, demonically elongated tongue of folk tradition — as the agent that sustains ‘the wheel of evil,’ that is, the vehicle through which unintegrated shadow content circulates destructively in the collective. Freud’s analysis of the ‘slip of the tongue’ opens a third domain: the tongue as the site where unconscious intention breaks through conscious speech, making parapraxis a royal road to hidden mental processes. Hillman extends this further, treating speech itself as alchemical operation — the tongue of fire that transmutes nigredo discourse into silvered, albedo-register language. Jaynes contributes the glossolalic dimension, linking speaking in tongues to trance states and the vestigial bicameral architecture of the mind. Together, these positions establish ‘tongue’ as a multi-valent threshold concept at the intersection of logos, shadow, the unconscious, and somatic expression.