Through the dream, the fantasy and the metaphor we expand our sensitive experience and can reach a different world view. Every time this happens the symbolic function becomes predominant and the process of knowledge is entirely entrusted (Fonzi et al., 1975; Durand, 1987). In hypnotic state, unlike spontaneous productions (dream activity, artistic expression ecc.), the symbolic function can be consciously channelled towards achieving specific goals. In this optical is examined a text of C. Lévi-Strauss (Lévi-Strauss, 1966) about a shamanistic ritual of healing and is compared with hypnotic techniques.