Within the depth-psychology corpus, ‘exploration’ operates on at least three interlocking registers that resist easy consolidation. In the somatic tradition — most fully articulated by Ogden and Levine — exploration names a discrete neurobiological action system, phylogenetically programmed into mammalian circuitry, whose activation by curiosity orients the organism toward novel stimuli, mobilises prefrontal observing functions, and is functionally distinguishable from, yet intimately entangled with, the play system. Trauma disrupts this system: defensive action tendencies overwhelm exploratory ones, and the therapist’s task becomes the deliberate rekindling of curiosity as a route back to present-moment somatic organisation. In the archetypal and mythological register — prominent in Campbell, Giegerich, and Harding — exploration figures as the quintessential human adventure into unmapped territory, whether geographic, cosmic, or intrapsychic; it carries the existential weight of self-exposure to the unknown and the dissolution of conventional shelter. A third, methodological register appears in motivational and relational approaches (Miller, Najavits), where exploration designates an interpersonal stance of open, non-directive inquiry into the client’s ambivalence or belief system. The central tension across these registers concerns whether exploration is a biological given that pathology suppresses, a heroic cultural imperative, or a therapeutic technique — distinctions that are frequently elided but whose differentiation illuminates much of what the corpus is arguing.