What Is Literary Theory and Its Boundary

In order to answer the question whether there is a boundary of theory,we should begin with the definition of within sociology of knowledge.The is an intellectual action which keeps on breaking up the old models and authority.It keeps dialogical relationships between its objects and previous background.So literary should be a dialogue between theory and literature.There are three types of theory,which were set up respectively by Walter Benjamin,Mikhail Bakhtin and Martin Heidegger.The boundary just stands in traditional theory,while it should be broken up in new types of theory.