The author proposes to examine the scientific dialogue established by Freud and Ferenczi between 1920 and 1933 after Freud's formulation of the Second Topic, the Pleasure Principle. It is very informative to explore the closeness of some formulations of Freud with the more important clinical and metapsychological intuitions of Ferenczi. The role of repetition, the value of affects, the second theory of anxiety, the elasticity of the psychoanalytical technique and the problem of traumatism are some of aspects developed in this paper.