The authors present a two-year supervision experience conducted at the COIRAG School of Psychotherapy, highlighting its educational function and exploring the role of dreams in the group learning process. The spontaneous emergence of participants’ dreams during the night between sessions offered an unprecedented opportunity to reflect on the educational process underway. In this perspective, dreams take on communicative and symbolic value, expressing a group mind that reflects the unconscious movements and conflicts linked to the training task. Supervision is a process that unfolds on two levels: the first level concerns the transmission of theoretical and technical content. A second, deeper and more structuring level concerns the transformative experience, which involves the mind and emotions. The training objective is to promote mental growth and the development of the professional self through the containment of anxieties and a shared re-elaboration of the clinical experience. Supervision is thus understood as a dynamic and creative process, where the emotional and group dimension becomes the driving force behind learning from experience.