Terrified Freud

"This is the common psychiatric experience that the devaluation of the psyche and other resistances to psychological enlightenment are based in large measure on fear–on panic fear of the discoveries that might be made in the realm of the unconscious. These fears are found not only among persons who are frightened by the picture Freud painted of the unconscious; they also troubled the originator of psychoanalysis himself, who confessed to me that is was necessary to make a dogma of his sexual theory because this was the sole bulwark of reason against a possible 'outburst of the black flood of occultism.' In these words Freud was expressing his conviction that the unconscious still harbored many tings that might lend themselves to "occult" interpretations, as is in fact the case. These "archaic vestiges" or archetypal forms grounded on the instincts and giving expression to them, have a numinous quality that sometimes arouses fear. They are ineradicable, for they represent the ultimate foundations of the psyche itself. They cannot be grasped intellectually, and when one has destroyed one manifestation of them, they reappear in altered form."

~Carl Jung, The Undiscovered Self. My bold.