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In page Carl Jung:

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After the break between Jung and Freud in 1913, Jung went through a pivotal psychological transformation, and, after the Munich congress,[citation needed] he was on the verge of a psychosis.[1]: 20-21 This was exacerbated by the outbreak of the First World War in August 1914. Jung described the experience as a horrible "confrontation with the unconscious".[2]: 25  He saw visions and heard voices.[2]: 29  He worried at times that he was "menaced by a psychosis" or was "doing a schizophrenia".[citation needed] These experiences precipitated his writing of his Red Book, his seven-volume personal diaries that were only published partially and posthumously in 2009.[citation needed]