“On some occasions long-term illnesses, for instance, are resolved suddenly through a dream. However, in most cases dreams prevent such chronic illnesses, providing through small therapeutics a constant series of minor but important personal revelations.
“That is, dreams are the best preventive medicine. Some psychological difficulties need clear conscious light and understanding. Others, however, operate even without conscious participation, and those are often solved, or remedied, at the same level without interfering with the conscious mind. As the body handles many physical manipulations without your own conscious knowledge of what is being done, or how, so the workings of your own psychological systems often automatically solve “their own problems” through dreams of which you are not aware.”
(The Nature of the Psyche, Session 796)