The sacred–profane dichotomy is a concept posited by the French sociologist Émile Durkheim, who considered it to be the central characteristic of religion: "religion is a unified system of beliefs and practices relative to sacred things, that is to say, things set apart and forbidden." In Durkheim's theory, the sacred represents the interests of the group, especially unity, which were embodied in sacred group symbols, or totems. The profane, however, involves mundane individual concerns. Durkheim explicitly stated that the sacred–profane dichotomy is not equivalent to good-evil, as the sacred could be either good or evil, and the profane could be either as well.