Synchronicity is the experience of two or more events that are apparently causally unrelated or unlikely to occur together by chance, yet are experienced as occurring together in a meaningful manner. This concept was first described in this terminology by Carl Gustav Jung, a Swiss psychologist, in the 1920s. Progoff, the author, who is both a Jung scholar, a teacher, and a practical and experiential proponent of Jung's work, discusses Jung and his relationship with this concept.

An exploration of Jung's concept of human psychic existence which affirms the validity of various levels of astrological, mystical, and parapsychic knowledge and experience

To Jung, synchonicity is a meaningful coincidence in time, a psychic factor which is independant of space and time. This revolutionary concept of synchronicity both challenges and complements the physicist's classical view of casualty. It also forces is to a basic reconsideration of the meaning of chance, probability, coincidence and the singular events in our lives.

C. G. Jung had a lifelong interest in the paranormal that culminated in his influential theory of synchronicity. Combining extracts taken from the Collected Works; letters; the autobiographical Memories, Dreams, Reflections; and transcripts of seminars, Jung on Synchronicity and the Paranormal sets out clearly his seminal contribution to our understanding of this controversial area. In his introduction, Roderick Main discusses Jung's encounters with and observations of the paranormal, the influences that contributed to his theory of synchronicity, and the central ideas of the theory itself. The selections include Jung's writings on mediumistic trance phenomena, spirits and hauntings, anomalous events in the development and practice of analytical psychology, and the divinatory techniques of astrology and the I Ching. The book also features Jung's most lucid account of his theory in the form of his short essay "On Synchronicity," and a number of Jung's less-known writings on parapsychology, his astrological experiment, and the relationship between mind and body. Jung on Synchronicity and the Paranormal addresses subjects that were fundamental to Jung's personal and professional development. Probing deeply into the theory of synchronicity, Roderick Main clarifies issues that have long been a source of confusion to Jung's readers.

Why coincidences happen and what they mean has long been an object of fascination. Here, Cousineau collects episodes of chance that defy explanation from the lives of real people. The author shows that recognizing synchronicity creates a deeper appreciation for the bonds that connect our lives.

Jung’s understanding of Yijing for supporting the synchronistic principle reveals the key issues of his archetypal theory. Jung’s archetypal theory, which is the basic motif of his understanding of Yijing, illuminates the religious significance of Yijing. Jung defines the human experience of the divine as an archetypal process by way of which the unconscious conveys the human religious experience. In this way, the divine and the unconscious mind are inseparable from each other. For the human experience of the divine, Jung’s archetypal theory developed in a theistic tradition is encountered with the religious character of the non-theistic tradition of Yijing. From Jung’s partial adaptation of Yijing, however, we notice the differences between Jung’s archetypal psychology and the Yijing cosmological view. This difference represents the difference between the Western and the East Asian tradition. This aspect is well shown in the fact that Jung’s theoretical assumption for the definition of archetype is deeply associated with Plato’s Idea and the Kantian a priori category. Accordingly, Jung brings their timeless-spaceless realm of archetype into the synchronistic phenomenon of the psyche and identifies the Yijing text with the readable archetype. Yet, the synchronistic moment that Jung presents is the phenomenon always involved in subjective experience and intuition, which are developed in the duration of time. The synchronistic phenomenon is not transcendent or the objective flowing of time-in-itself regardless of our subjective experience.