A rapid overview of recent ethnological literature on the basis of the effectiveness of speech in magic-religious rituals shows that there are two main trends among researchers: some explain the effectiveness of speech by the special construction of magic speech (rhetoric processes and performance aspects of magic language), others by the evocative power of words. The therapeutic word desana is a silent, silent and no receiver. It operates on a mode that violates the main functions of language perceived as a means of communication and translation of thought. In this private and silent aspect, the therapeutic ritual of kũbũ differs from the usual shamanic cures that are often presented as a kind of dramatization, by gesture and/or by word, of the fight that the Shaman leads with the spirits. C. Levi Strauss (1958) showed that the effectiveness of the cure was based on a triple experience - those of the shaman, the patient of assistance - and the primary role of the hearing, which, through its participation, stimulates and strengthens the cure of the Shaman. The cure carried out by the kũbũ is, on the contrary, a lonely ritual. The kũbü gives nothing to see, nothing to hear "nobody is there to listen," insists the Desana. The shamanism of kũbü is a shamanism of silence and that is where its originality lies.