After an introduction by Pier Francesco Galli, a paper read by Silvia Montefoschi (1926-2011) on December 14, 1962, in Milan at a training course on "Problems of psychotherapy" is reprinted. This course was organized by Pier Francesco Galli and the "Milan Group for the Advancement of Psychotherapy" (that later took the name of Psicoterapia e Scienze Umane). Silvia Montefoschi discusses the problem of the opposites in Carl Gustav Jung’s Analytical Psychology. Also the full discussion that followed that presentation is reprinted, with 60 interventions (by Glauco Carloni, Pier Francesco Galli, Silvia Montefoschi, and Mara Selvini Palazzoli), in which, among other things, Jung’s critique to the Freudian concept of penis envy is discussed.
Keywords: Carl Gustav Jung, opposites, animus, archetypes, penis envy