Abstract
This paper examines the concept of purity, which dominates Plato’s diairesis as the trademark between true claimants and false claimants, copies and simulacra. This moral concept seems to be related to a political and practical attempt to shape the amorphus, to exclude the excess and to stratify the Body without Organs. In the same attempt the overturning of Platonism will emerge as the possibility of a world of freed differences and freed simulacra, like Deleuze suggests in Difference and Repetition (1968) and in The Logic of Sense (1969). Nietzsche’s work will guide us in the interpretation of this world of freed simulacra. Finally, we are going to study through the lens of A Thousand Plateaus (1980) the biopolitical application of the purity paradigm in connection with the Leviticus, in particular the moral hermeneutics of leprosy and the exclusion of the leper, considered to be impure.