Mind Space emerges in the depth-psychology corpus as one of the most generative yet contested structural concepts for understanding consciousness itself. Julian Jaynes, its most technically precise theorist, defines mind-space as the primary feature of consciousness — the metaphorically constituted interior arena in which an analog ‘I’ moves, attends, and introspects, modelled upon bodily navigation of physical space. For Jaynes, this space is not given but constructed through layers of linguistic metaphor: the mind becomes a place one enters, scans, and populates with spatially arranged objects of thought. This constructivist account stands in productive tension with contemplative traditions that posit psychological space not as metaphorical artifact but as the intrinsic, luminous ground of awareness. Welwood, drawing on both Buddhist phenomenology and Western depth psychology, distinguishes feeling-space, open space, and the absolute emptiness of awareness — arguing that contracted versus expanded space registers the degree of ontological groundedness in the subject. Sri Aurobindo situates mind-space within a graduated hierarchy of consciousness, from surface-mental to supramental, in which subjective Space-extension discloses realities inaccessible to ordinary perception. Evans-Wentz’s transmission of Tibetan teachings adds the radical claim that the One Mind transcends both space and time as ordinarily conceived. The term thus marks a crucial fault-line between cognitive-constructivist and non-dual transpersonal accounts of interior topology.