On the basis of the assumption that the understanding of Freud's work can gain much from illuminating his own psychological development, the author tries to reconstruct the evolution of his self-analysis. Against the common view of placing it in the context of his relationship with Fliess, the author shows how it actually evolved out of a whole series of experiences and relationships. Freud's self-analysis was initially nourished by his study of the Greek and Latin classics; it acquired the necessary interpersonal dimension through his relationship with Emil Fluss and Eduard Silberstein; it gained a cathartic and thus therapeutic quality through his relationship with Martha; and it eventually became a professional enterprise once his patients forced Freud, with the help of Wilhelm Fliess, to systematically look into himself.