This is a short essay written by Jung in 1911 in response to an article which criticized his theories, titled "Morton Prince M.D.: The Mechanism and Interpretation of Dreams: Ein Kritische Besprechung" The original manuscript of this article was published in "Jahrbuch für psychoanalytische und psychopathologische Forchungen" in Wien and Leipzig in 1911. The article that Jung is criticizing was published in English in the Journal of Abnormal Psychology (Boston 1910). Here Jung extensively responds to criticism of Psychoanalytical theory, and quotes from Morton Prince in English extensively. Jung also talks about Professor Hoche in Freiburg who described Freud and his school as "afflicted by epidemic madness" and wrote a famous article about it.