This article proposes an anthropological perspective of the models of accession mobilised by the French Government and the associations to combat cults since the early 2000s, in the light of globalisation of ritual practices mobilising the use of hallucinogens. Based on an ethnographic survey conducted in Peruvian Amazon and Europe and an anthropological approach to the believer, I explore here the nature of the accession that has been generated by the hallucinogenic experience. Far from the model of “mental manipulation” mobilized by the French government, the latter appears to be highly dynamic. Supported by the remarkable properties of hallucinogenic experience, membership appears to be a fabric of doubt and reflective ambivalence, depending ultimately on social interactions in which the believer is part of the subject and the benefits he hopes to draw from the practices he is taking. Keywords: Belief, Sectary Drives, Mental Manipulation, Ayahuasca, Hallucinogenic substances, Amazon, Peru.