Dear Mrs. C ., 3 May 1960
I have read your letter with great interest.
It is true that a certain kind of resistance has an almost murderous effect, as if it were a physical assault.
It is even as if the vehemence of the attack were not wholly in the consciousness of the aggressor, but rather in the air round him.
Thus it is not properly directed, and therefore anybody getting into this atmosphere will undergo its violent effect.
If he happens to be weakened he will get injured, while the stronger one will be able to deflect the blow, which he can do more successfully if somebody is present who offers a sort of safety-valve by which the intensity of the evil force can escape.
Such an event points to your strength, which seems to me enough to cope with unusual situations.
If wisely used, it will be a strong defense, but don't assume that it is your personal property, being rather a grace than anything else.
My best wishes,
C.G. Jung ~Carl Jung, Letters Vol. II, Pages 555-556