Carl Jung himself said: I had the feeling that I was in an over-compensated psychosis, and from the feeling I was not released until August 1, 1914. (see here for context) His psychosis lasted a long time and he worked it out. This is a stunning revelation that will be even more controversial then all the body of his work to this day. There was an unpublished book that has, many years after his death, been made available. The Red Book. It's a lovely and emotionally stunning book in my opinion. The art alone is worth the purchase price.