Synchronicity is a meaningful coincidence — two events that have no ordinary cause-and-effect link, yet line up so strikingly that they feel significant. Carl Jung called it an "acausal connecting principle."
Coined between 1928 and 1930 by psychiatrist Carl Jung, who developed it further with physicist Wolfgang Pauli in their 1952 book.
// Where it sits
The events may be pure chance; synchronicity is the layer of meaning you feel over them — which is exactly what Jung was pointing at.
What it really means
Synchronicity is the name Carl Jung gave to a feeling almost everyone has had and few can explain: a coincidence so apt it seems to mean something. You think of an old friend and the phone rings; a stranger says aloud the exact words in your head; a symbol from a dream shows up, uninvited, in the waking world. Nothing caused the two to line up — and yet the alignment lands like a message.
Jung called it an "acausal connecting principle," which is a careful way of saying: these events aren't linked by cause and effect, but by meaning. That last word is doing all the work. Synchronicity isn't really a claim about the physics of coincidence; it's a claim about experience — that the human mind sometimes finds its inner state mirrored in the outer world so precisely that it can't help reading significance into the timing.
Which is why it sits, honestly, between psychology and mysticism. Sceptics point out, fairly, that with billions of events a day, striking coincidences are statistically guaranteed. Jung wasn't disputing the odds; he was interested in the felt meaning — the way certain coincidences seem addressed to you personally. You don't have to believe the universe is sending mail to notice that, now and then, it certainly feels that way.
Where it comes from
'Together in time' — events that coincide in time and, Jung argued, in meaning.
Myths & misconceptions
Synchronicity is proven science.
It's Jung's psychological concept, not an established physical law — a lens for meaningful coincidence, not a measured mechanism.
Synchronicity is just coincidence.
Jung's whole point was the felt meaning: a coincidence that lands as significant to you, and which he held to be connected by meaning rather than by cause — his 1952 essay is subtitled 'An Acausal Connecting Principle'.
Compare & contrast
Synchronicity vs coincidence
A coincidence is just two things happening to line up by chance. Synchronicity is a coincidence that carries meaning — where the timing feels so apt it seems to speak to your inner state. Same events; the difference is the significance you feel.
| // | Synchronicity | Coincidence |
|---|---|---|
| Link | Meaningful (acausal) | Pure chance |
| Feels | Significant, fated | Random |
| Key ingredient | Personal meaning | None needed |
| Framed by | Jung | Statistics |
How it connects
Questions people ask
- What is synchronicity?
- Synchronicity is a meaningful coincidence — two events with no causal link that align so strikingly they feel significant. Carl Jung coined the term for moments when your inner state and an outer event seem to mirror each other in a way that feels more than random.
- What's the difference between synchronicity and coincidence?
- A coincidence is just chance alignment. Synchronicity is a coincidence infused with meaning — the timing feels apt, even fated. The events might be identical; the difference is the significance you personally feel in them, which is the heart of Jung's idea.
- Who came up with synchronicity?
- The psychiatrist Carl Jung, between 1928 and 1930. He defined it as an 'acausal connecting principle' and developed it in the 1950s with physicist Wolfgang Pauli, linking psychology and ideas from physics.
- What's an example of synchronicity?
- Jung's famous case: a patient described a dream of a golden scarab, and at that moment a real scarab-like beetle tapped at his window. Everyday versions: thinking of an old friend seconds before they call, or a stranger echoing the exact phrase on your mind.