In Mysterium Coniunctionis, Jung points to a fundamental difference between Christian religion and alchemy. Both are concerned, according to him, with the monumental task of unifying opposites; but Christian religion finds these opposites projected in spirit (Geist) and alchemy projects them into physis (Stoff), whereas “none locates the problem where it originated, namely, in the human soul”...
In the case of Spirit, Jung does not talk about an individual’s process of integrating archetypal contents as psychological functions: he claims that such a process happened as an overarching development in the history of the human species. That, of course, is a variation on an origin myth: a phantasy, projected backwards into history.
Synchronicities are something that "appears” in an individual person’s life, usually at some particular stage or around some event. Therefore, we can assume that there are certain patterns in people’s lives when archetypes are triggered, resulting in greater likelyhood of experiencing synchronicities.
It is well known that Jung felt some special affinity with the mediaeval world in general, and with alchemy in particular. He saw connections there with the core of the psychology of the individuum.
Leif Frenzel is a writer and independent researcher. He has a background in philosophy, literature, music, and information technology. His recent interest is Jungian psychology, especially synchronicities and the relationship between consciousness and the unconscious.