To Dr. S.
Dear Colleague, 20 October 1939
If you do not go along with the unconscious properly, i.e., if it finds no expression through consciousness and conscious action, it piles up its libido in the body and this leads to physical innervations.
Autoerotism, of course, is itself an unnatural hyper-innervation.
There are, however, certain clinical differences between autoerotism and hyper-innervation caused by a blocked unconscious.
In the latter case we have chiefly disturbances of the sympathetic system or psychic disturbances in the form of heightened attention to the body.
The unconscious is largely identical with the sympathetic and parasympathetic systems, which are the physiological counterparts of the polarity of unconscious contents.
You won’t get out of the “old house” until you have drained to the last drop what is going on there.
Only then can the situation change.
With kindest regards,
C.G. Jung ~Carl Jung, Letters Vol. 1, Page 278