It is argued that what is at stake in psychoanalytic theory, is first of all psychoanalytic practice, i.e. the endeavour to guide the psychoanalyst in bringing his conception of his experience above the level of common sense knowledge. Secondly, psychoanalytic theory must be constructed in such a way that it holds out from a scientific point of view. More specifically, Lacanian theory is a theory on the subject, on desire and on jouissance and must be situated in the intersection of cognitivism (the symbolic) and ethology (the imaginary), while it introduces a third dimension, that of the jouissance (the real). Furthermore, it is argued that psychoanalysis discovered that in the human animal language has emancipated itself from its operational function in that it parasitizes and transforms animal jouissance.