Within the depth-psychology corpus, ‘Wing’ operates across at least three distinct registers that occasionally illuminate one another. In Jung’s autobiographical writing, the wing functions as an architectural metaphor for the unconscious: the unknown annex of a house that one has never entered, discovered only in dream, and found to contain precisely those alchemical and symbolic materials that will later animate decades of research. Here the wing is a spatial figure for psychic extension — the dimension of selfhood not yet inhabited. In the I Ching commentarial tradition, ‘Wing’ designates the classical Ten Wings (Shih I), the interpretive appendices attributed to Confucius, and individual wings are numbered and referenced precisely as hermeneutical layers superimposed upon the hexagram texts; this usage is technical and structural rather than imaginal. A third register — equally technical but institutionally grounded — appears in Bion’s wartime group-therapy experiments, where ‘training wing’ names a specific organizational and therapeutic unit whose esprit de corps becomes evidence for group-psychological dynamics. The etymological tradition, represented by Beekes, supplies the Indo-European substrate linking feather, flight, and spiritual aspiration. Across all these registers the term marks a relation between bounded structure and potential movement — the wing as what enables ascent, extension, or access to otherwise unreachable territory.