It seems most natural to imagine the coniunctio as a horizontal union like a “marriage”. But instead of such a harmless idea of it, we must follow Jung and understand the coniunctio as a vertical and, indeed, outrageous crossing over from one level to another, higher level, e.g., from the finite to the infinite, or vice versa. After the exploration of the psychological concept of coniunctio , this book examines whether Jung’s psychology, the way it is internally construed, is capable of doing justice to its own concept of it and of making the coniunctio plausible as a goal to be achieved in the individuation process. The result of this examination is negative and is shown to be mainly due to Jung’s personalistic and empiricist bias, with which Jung, as a modern man, had to pay his tribute to the logic of modernity. Modernity is characterized by the logic of disiunctio and thus excludes such a thing as the coniunctio . This is made evident by means of numerous phenomena as “symptomatic signs” from various areas of modern reality. We cannot escape the insight that there is a revivalist tendency at work in Jung’s goal of the individuation process, which forces the question on us (modeled on a Biblical saying): For what is the soul profited, if a person shall acquire a private feeling for the infinite when the soul knows full well that this infinite is no longer backed up by its, the soul’s, own logical life in our modern world