C. G. Jung 
Synchronicity [PDF ebook] 
An Acausal Connecting Principle

To Jung, synchonicity is a meaningful coincidence in time, a psychic factor which is independant 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.