This introduction presents an overview of key concepts discussed in the subsequent chapters of this book. The book concerns Jung's personal background, followed by an attempt to distil from this the personal images and myths that may have been moving Carl Gustav Jung and propelling him to make sense of this inner experience. It seems that from then on all went fairly well with Jung's schooling, although he became aware, at an early age, about twelve, of two personalities within himself. Indeed, Jung says as much in his autobiography, when referring to an occult book he read during his student years. Given his personal history, it must have seemed to Jung that psychiatry might fulfil his need to reconcile the opposites within himself, the Number One and Number Two personalities, the rational with the irrational, the objective with the subjective.