Coincidence (n.) is the simultaneous occurrence of causally unconnected events. Just as all events in man's life are objectively connected causally, so too are all event's in a man's life connected subjectively, existing only in relation to the individual , subjective, but just as necessary as his own dreams.
A Coincidence (n.) such as the tram ticket matching the theatre ticket bought just after, and the same number in a phone call that evening, defies causal connection — yet chance events must fall into aperiodic clusters, or they would not be chance.
A Coincidence (n.) can feel numinous and still be chance: six fishes in twenty-four hours, while Jung was studying the fish symbol, made a strong impression — but the strength of an impression proves nothing against fortuitousness.
A Coincidence (n.) struck Flammarion while he was writing the chapter on wind-force: a sudden gust swept his papers off the table and out of the window.
A Coincidence (n.) may add a term after you have written it down: months after recording his run of six fishes, Jung walked to the lake and found a foot-long fish lying on the sea-wall, where no one had been.
Coincidence (n.) is to the Western mind chance and nonsense; the waves wash up an old hat, a box, a shoe and a dead fish, and the Chinese mind asks what it means that they lie together.