Freud begins his self-analysis.
In a letter to Fliess of September 21 1897 he confesses that he has abandoned his "seduction theory" according to which neuroses were caused by actual sexual abuse in childhood. "I no longer believe in my neurotica," he writes of his dilemma, and now considers that the central role in the genesis of neuroses is played not by childhood sexual experience but by the fantasies to which it gives rise.
Letter from Fliess
Letter from Wilhelm Fließ 21.9.1897
Through a systematic study of his own dreams Freud seeks to explain his own psychology and development. Engrossed in the dream analysis, Freud writes to Fliess on October 3, 1897: "Outwardly very little is happening to me, inwardly something of great interest. My self-analysis, which I consider indispensable in the elucidation of the whole problem, has continued in dreams over the last four days and provided me with invaluable information and clues... I cannot convey to you any idea of the intellectual beauty of this work."
His study "Infantile Cerebral Paralysis" appears.