Starting from the distinction between reading, writing and loosing as forms of knowledge (mathesis), proposed by Lacan in the seminar about the Psychoanalytical act the paper deals with the constitution of the subject and the real relating each of these terms to a specific form of knowledge: reading is related to Plato´s Reminiscence theory, writing, to science and loosing to psychoanalysis itself. Emphasizing the subversion suffered by knowledge in it´s relation to the psychoanalytical field the article concludes that psychoanalysis implies some extent of loss that will necessarily fall upon the subject´s relation to knowledge and act.
psychoanalysis; subject; science; real; act