To Dieter Meyer
Dear Herr Meyer, 26 January 1959
The symptom you describe is a particularly pronounced instance of the sentiment du defa-vu.
It is usually explained as a sort of memory hallucination.
It is true that such cases do occur in states of fatigue, but considering the nature of the symptom, and especially when it happens habitually, it seems to me to be something else, namely an actual fore-vision, whether in a dream or simply when one is asleep, of situations which in themselves are completely trivial and which one no longer remembers afterwards although one has a sentiment du defa-vu.
This interpretation seems to me particularly appropriate where an actual and conscious fore-vision has occurred.
These ESP (Extra-Sensory Perception) phenomena are much more common than is generally assumed.
They point to a quality of the unconscious which is outside the categories of time and space.
Rhine’s experiments, conducted with large numbers of people, offer irrefutable proof of this.
There is nothing uncanny about it, since experiences like yours come within the range of the normal.
C.G. Jung ~Carl Jung, Letters Vol. II, Page 479