This book brings C.G. Jung and his successors in type theory into conversation with the French philosopher Emmanuel Levinas. It takes a radical view of post-modernist theory which, the author argues, is relentlessly introverted. A turn to the face of the other signals the disruption of the introversion endemic to Western culture at the moment, this is both a moral and an existential turn. A conception of mediation as transformative, and thus therapeutic, practice requires a recognition of psychic worlds beyond our own and a considered, skilled extraverted turn that simultaneously engages different psychic functions and the potential for transformation of relationship and self.