Working on Carl Jung and Pierre Janet requires a journey to the late nineteenth and early twentieth centuries, to the Geneva of 1892 when Theodore Flournoy was appointed by the Swiss Government to the first chair in psychology. By reflecting on the relationship between Jung and Janet, it becomes evident that from the earliest years of his development as a psychiatrist and psychologist, Jung’s attitude was that of a free spirit. Jung attributed great importance to the analyst’s countertransference feelings. In his praxis, he considered the impact of the personal equation on the analytic relationship as well as the importance of an analytic attitude that can read the oneiric contents as an expression of the patient’s needs and pathology. In more than 50 years the early experimental researches had grown far beyond the initial nucleus. William James and Jung met personally in 1909 at Clark University, where Jung presented on the association experiment.