This might be the image Tina Keller is referring to in the following statement in an interview, where she recalled Jung’s discussion of his relations with Emma Jung and Toni Wolff:
“Jung once showed me a picture in the book he was painting, and he said, ‘See these three snakes that are intertwined.
This is how we three struggle with this problem.’
I can only say that it seemed to me very important that, even as a passing phenomenon, here three people were accepting a destiny which was not gone into just for their personal satisfaction”
(interview with Gene Nameche, 1969, R. D. Laing papers, University of Glasgow, p. 27). ~Liber Novus, Page 288. Footnote 141.