Unité de l’Église et définition de l’hérésie au XIIe siècle

Abstract

The Church is constituted as a “ system” in the crucible of the Gregorian Reforms of the XIth and XIIth centuries. This system is supported by a discourse on the unity of the sacramental Christian community, to which is opposed a whole spectrum of dissidents : heretics, Jews, pagans and Moslems. In this sense, ecclesiology is essentially heresiology. From this standpoint, of a study of Catharism as an endogenous phenomenon of western Christianity, this paper focuses on the study of dualism as a paradoxical evolution of the questions posed by the problem of duality, a duality superseded by hierarchical thinking that imposes a third party dynamic.