Carl Jung called this book a commentary on the prodromal stages of schizophrenia. The object of his research was the writings of the American performer Miss Frank Miller. After reading her papers, Jung decided the lady was developing an early stage of schizophrenia. Although he was eventually wrong, the work is considered one of his main works and belongs to his major opus "Symbols of Transformation" under the name "Miller Fantasies." Later in his life, Jung acknowledged that, in fact, he was trying to analyze his own psyche and referred to personal problems.