“The Transcendent Function,” was written in 1916, while Jung was in the middle of his “deep reaching interior metamorphosis.” (He was serving a stint of military duty, stationed near the Gotthard Pass at the time.) Yet it wasn’t published until 1957, and only then when Jung was asked to contribute to a student publication, not something many of his readers would see. For forty years it remained in Jung’s files, off-limits to the general public. Jung discussed the ideas in seminars and lectures, but usually only with his closest students, rather like an initiate sharing the most profound mysteries with only his most devoted pupils. Although subsequent Jungian analysts have recognized their importance, neither idea plays a prominent role in any of Jung’s major works. For example, in Mysterium Coniunctionis , Jung’s alchemical magnum opus, active imagination warrants only a brief mention, again not by name, and the transcendent function is mentioned only twice. As is often the case with Jung’s ideas, we need to go to his followers for anything like a clear definition.19 Some suggest Jung kept quiet about active imagination because he considered it possibly dangerous. In a note, he cautioned that through it “subliminal contents . . . may overpower the conscious mind and take possession of the personality.”20 That Jung came upon it precisely when his own subliminal contents were mutinying against his ego makes this a reasonable concern. Yet there may have been other reasons. Weak egos might fragment practicing active imagination, but what would his peers think of a psychologist who talked to people in his head? As with his public and private opinions about spirits and the occult, Jung seems to have kept quiet about things that could threaten his persona as a scientist.”