Marie de la Trinité (Lyon, 1903) discovered her religious vocation very early, in the midst of a childhood full of difficulties. Her life is marked by a mystical experience (in 1929) with which a conflict of obedience with monastic life begins. Feeling ill, she seeks help from psychiatrists and psychoanalysts, among whom is Dr. Jacques Lacan. The chemical cure that she undertakes in 1954 at the Bonneval hospital leads her to the brink of madness. After going through this extreme experience she rejoins life in the convent, considering her spiritual life in a way that takes into account what she learned about her during her illness and her psychoanalysis. From 1956 she began her training period as a psychotherapist, after which she returned to the convent in Flavigny. When the congregation left the place in 1970, she remained until her death—in 1980—alone in a small outbuilding of the old convent.