The problem of synchronicity has puzzled me for a long time, ever since the middle twenties, when I was investigating the phenomena of the collective unconscious and kept on coming across connections which I simply could not explain as chance groupings or "runs." What I found were "coincidences" which were connected so meaningfully that their "chance" concurrence would represent a degree of improbability that would have to be expressed by an astronomical figure.
Carl JungDoesn't the world bring forth thinking in human heads with the same necessity that it brings forth blossoms on the plant?
Carl JungIf only simplicity were not the most difficult of all things. It consists of watching objectively the development of any fragment of fantasy.
Carl JungSynchronistic phenomena prove the simultaneous occurrence of meaningful equivalences in heterogenous, causally unrelated processes; in other words, they prove that a content perceived by an observer can, at the same time, be represented by an outside event, without any causal connection. From this it follows either that the psyche cannot be localized in time, or that space is relative to the psyche.
Carl Jung