Hypothesis:
A. Creative illness (Freud, Ellenberg) = dark night of the soul (Christian mystics) = spiritual emergency (Grof, S. and C.).
B. These similar psychological phenomena grow out of a similar "cause" or process: phenomenological-psychological reduction (Applebaum), contemplative meditation (e.g., Dominican prayer), altered states of consciousness (Wilber, Tart, and others), and Freud's psychoanalysis (in his case, his self-analysis).
Next step: Go deeper, including comparisons among descriptions for each concept (e.g., columns and rows mapping(?) characteristics).
References (partial list, draft form):
Which The Phenomenologist. (2021) Key ideas: Applebaum on the phenomenological reduction - PhenomenologyBlog. Retrieved April 03, 2021, from https://phenomenologyblog.com/?p=616
Ellenberger, Henri F. (1970). The Discovery of the Unconscious: The History and Evolution of Dynamic Psychiatry. New York: Basic Books.
Grof, C., & Grof, S. (2017). Spiritual emergency: The understanding and treatment of transpersonal crises. International Journal of
Transpersonal Studies, 36 (2). http://dx.doi.org/10.24972/ijts.2017.36.2.30
Itself Because Not. (2021) The Concept of ''Creative Illness'' - Physicists and Artists Have Found a Common - Sleep and Health Journal Chicago. Retrieved April 03, 2021, from https://www.sleepandhealth.com/concept-creative-illness-physicists-and-artists-ha/
Charles Rycroft. (2021) Freud's Creative Illness | by Charles Rycroft | The New York Review of Books. Retrieved April 03, 2021, from https://www.nybooks.com/articles/1985/05/30/freuds-creative-illness/?lp_txn_id=1232790
Smith, David Woodruff, "Phenomenology", The Stanford Encyclopedia of Philosophy (Summer 2018 Edition), Edward N. Zalta (ed.), URL = <https://plato.stanford.edu/archives/sum2018/entries/phenomenology/>.
