Synchronicity (German: Synchronizität) is a concept first introduced by analytical psychologist Carl G. Jung "to describe circumstances that appear meaningfully related yet lack a causal connection."[1] In contemporary research, synchronicity experiences refer to a person's subjective experience that coincidences between events in their mind and the outside world may be causally unrelated to each other yet have some other unknown connection.[2] Jung held that this was a healthy, even necessary, function of the human mind that can become harmful within psychosis.