Synchronicity: An Acausal Connecting Principle, by C.G. Jung, is a book published by Princeton University Press in 1960. It was extracted from Structure & Dynamics of the Psyche, which is volume 8 in The Collected Works of C. G. Jung. The book was also published in 1985 by Routledge.
To Jung, synchronicity is a meaningful coincidence in time, a psychic factor which is independent of space and time. This revolutionary concept of synchronicity both challenges and complements the physicist’s classical view of casualty. It also forces is to a basic reconsideration of the meaning of chance, probability, coincidence and the singular events in our lives.
“We often dream about people from whom we receive a letter by the next post. I have ascertained on several occasions that at the moment when the dream occurred the letter was already lying in the post-office of the addressee.”
― C.G. Jung, Synchronicity: An Acausal Connecting Principle