This is a detailed report of an hour in the third week of an analysis in which the patient demonstrated his typical defense mechanism in dealing with his oral hostility and his retaliation fear during a sudden depressive mood. He thus afforded insight into the dynamics of his neurosis. His transference feelings were provoked by the fact that before starting his analysis with Rothenberg, he had been in treatment with a woman analyst for a year, and this change had reactivated his basic oral sadistic conflict with his widowed mother.