Communication for the "Reading the Social Sciences" seminar. CURAPP-ESS, UPJV, Amiens, France. February 18th 2021. The purpose of this communication was to lay the foundations of a global search for Nietzsche's influence on Roland Barthes' critic of literary standards and theory of the text: on interpretation, on lecture and on value. By this presentation, we wanted to show that Barthes' theses on language and on meaning were greatly inspired by Nietzsche. Barthes continued Nietzsche's philosophical project of finding what in language comes under affectivity and individuality. By presenting pleasure as the truth, in a certain way, of reading and writing (I), we discover Barthes' semiology as the science which takes care of differences in language, in other words the "impurity" of traditional analysis (II). This new perspective permits Barthes to construe genesis of literature and new discourses, new ways of using language (playing, "logothesis") (III).