Unfolding the Enfolded...

Carl Jung, who coined the term, synchronicity, defined it in his classic work, Synchronicity:

An Acausal Connecting Principle, as ...a meaningful coincidence of two or more events, where something other than the probability of chance is involved.

Vic Mansfield, in Synchronicity, Science and Soul-Making, stresses the importance of the meaningfulness and nonseparability of the inner psychological state as its correlates with the objective outer event.

Synchronicity...requires us to appreciate that the meaning revealing itself in the inner and outer experiences is more significant, more real, than either our subjective state or the objective events. Such memorable experiences make us aware of a different kind of nonseparability than between regions A and B in physics--the nonseparability between our minds and nature, something on a different level....
[Mansfield, p.114]

Allan Combs and Mark Holland, in Synchronicity - Science, Myth and the Trickster, explain the mythological archetype as a synchronistic agent.

Vic Mansfield, in Synchronicity, Science and Soul-Making, explains the nature and meaning of emptiness from the perspectives of Middle Way Buddhism, quantum physics and Jungian synchronicity

As Jung has earlier pointed out, it is the nature of synchronicity to have meaning and, in particular, to be associated with a profound activation of energy deep in the psyche. It is as if the formation of patterns within the unconscious mind is accompanied by physical patterns in the outer world. In particular, as psychic patterns are on the point of reaching consciousness then synchronicities reach their peak; moreover, they generally disappear as the individual becomes consciously aware of a new alignment of forces within his or her personality.

Synchronicities are therefore often associated with periods of transformation; for example, births, deaths, falling in love, psychotherapy, intense creative work, and even a change of profession. It is as if this internal restructuring produces external resonances or as if a burst of 'mental energy' is propagated outward into the physical world.

        Except form F. David Peat, Synchronicity - The Bridge
                                         Between Matter and Mind, p. 27.