Years later, Jung spoke to Aniela Jaffe concerning the relationship with Toni Wolff.
He said that he was faced with the problem of what to do with her after her analysis, which he said he had ended, despite feeling involved with her.
A year later, he dreamed that they were together in the Alps in a valley of rocks, and that he heard elves singing, and that she was disappearing into a mountain, which filled him with dread.
After this, he wrote to her.
He noted that after this dream, he knew that a relationship with her was unavoidable, and that his life was in danger.
On a later occasion, while swimming, he found himself with a cramp and vowed that if it went away and he survived, he would give in to the relationship. ~The Black Books, Vol. I, Page 30
T.W. was experiencing a similar stream of images.
I had evidently infected her, or was the declencheur [trigger] that stirred up her imagination.
My phantasies and hers were in a participation mystique.
It was like a common stream, and a common task.
Gradually I became conscious and gradually I became the center; and in the measure to which I attained these insights, she also found her center.
But then she got stuck somewhere along the way, I remained too much the center that functioned for her.
Therefore I was never permitted to be other than she wanted me to be, or than she needed to have me be.
At that time she was entirely drawn into this terrible process in which I was involved, and she was just as helpless as I was. ~Carl Jung, The Black Books, Vol. I, Page 31-32