Dear Dr. Rudin, 1 October 1954

My very best thanks for kindly sending me your interesting essay on freedom.

The latest developments of scientific thinking, especially in physics, but recently also in psychology, make it clear that “freedom” is a necessary correlate to the purely statistical nature of the concept of causality.

In particular it comes into the category of meaningful coincidences, which I have discussed in my book on synchronicity.

Freedom could be put in doubt only because of the one-sided and uncritical overvaluation of causality, which has been elevated into an axiom although-strictly speaking-it is nothing but a mode of thought.

Yours sincerely,

C.G. Jung ~Carl Jung, Letters Vol. II, Pages 182-183.