Abstract: Guilhem Farrugia examines the light that Rousseau’s Correspondance throws on his Confessions. Through this process of intertextuality, he establishes the mechanics of Rousseau’s project, and identifies felicity as the object of his vital quest : a personal motif and a spur for autobiographical writing. This original work considers happiness as experience and, in doing so, extends and completes a long tradition of research on the subject.