This article conveys the psychoanalyst’s hallucinatory experience during a session with a patient who experienced premature birth trauma. Engaging with the patient’s primal fears of disappearance and confusion with the object through hallucinosis initiated the analyst’s engagement with her own trauma. The concept of osmotic communication within the patient-analyst relationship is viewed as central to description and understanding of the primal dialogue of two unconscious minds. The filtration of psychic content from the patient’s to the analyst’s unconscious is facilitated by the semipermeable membrane of analyst’s receptivity. As a recipient, the analyst embodies and processes the patient’s unmentalized experiences in a transformative manner.