This first volume of The Collected English Papers of Wolfgang Giegerich takes its title from Giegerich’s ground-breaking paper, On the Neurosis of Psychology, or The Third of the Two, originally published in Spring Journal in 1977. The third referred to in the title is psychology itself as the theory in which the two, patient and analyst, are contained as they engage with one another in the analytic process. By applying to psychology itself the ideas that analytical psychology draws upon when thinking about the patient, Giegerich establishes the basis for a psychology that defines itself as the discipline of interiority. Topics include Neumann’s history of consciousness, Jung’s thought of the self, the question of a Jungian identity, projection, the origin of psychology, and more.