Collected Works of C.G. Jung, Volume 9 (Part 2): Aion: Researches into the Phenomenology of the Self 2nd Edition, Kindle Edition

Good Read.

I've read The Origins and History of Consciousness and Modern Man in Search of a Soul, so I didn't go into Aion completely blind. The beginning and end of Aion are readable and very interesting, but the bulk of the book is absolutely thick with obscure foreign text, words, names, and historical references that only scholars would recognize. His conclusion and summary at the end feels like a breath of fresh air, a welcome clear explanation rather than a relentless encyclopedia. Unless you learn hundreds of new words, you may feel your mind going numb from the density of obscure references.

"Circumambulation", "enatiodromia", "nirdvandva" are some examples of the types of words that Aion is thick with. These are absolutely dense throughout the book and Jung frequently writes in foreign alphabets. Most readers will simply give up ever sorting through it all line by line and will accept that they will have to skim past some of the obscurities or spend months doing outside research on definitions. The obscurity of the texts he cites is absolutely staggering. If you speak multiple languages and are a scholar of alchemy and religious history then you'll have a necessary leg up. If not, you may find yourself only able to absorb so many paradoxical ever-changing uses of the same symbols through various cultures and time periods before deciding that it's such a mess that it needs simplification rather than encyclopedic documentation.

That is not to say that the subject matter isn't fascinating or that it lacks value - clearly this is amazing subject matter and impeccably researched. Just be forewarned that there is a brick wall of ancient, obscure reference material and (often changing) symbolism dropped relentlessly, line after line.

I found a lot of this book formidably dense. Recently I read an introductory book on Jung by psychoanalyst Anthony Storr that sheds some light, even though Storr never specifically mentions AION. Storr observes a tendency in Jung's thinking to describe the psyche as a self-regulating mechanism, like the human endocrine system. For example, extraverted activity in the unconscious compensates for introverted activity in the conscious (or vice versa). Also, a neurosis may be the unconscious's way of compensating for overly one-sided thinking in the conscious. Similarly, a schizophrenic delusion may be the psyche's (unsuccessful) attempt to restore a lost mental balance.
Examples of this balance/compensation principle in AION:
(1) The Christ symbol. It's a symbol of the Self (like most of the symbols and archetypes discussed in the book), but it lacks a Shadow or inferior component; consequently, the early Christians were compelled to generate the Anti-Christ symbol. However, since the Christ and Anti-Christ are separate entities in traditional Christian thinking, the Western worldview has become highly dualistic and Manichaean, good vs. evil.
(2) The God archetype. As Western thinking has become increasingly secular over the centuries, the God-image has become repressed into the unconscious, where it emerges in savage political forms such as fascism, a worship of the State. (Jung wrote this a few years after World War II.)
(3) Leviathan and Behemoth. "God's monstrous antagonist produces a double because the God-image is incomplete..." (pg. 120).
(4) Sons of God in Catharist legend: Satanael the elder son, Christ the younger son. Similar to the Christ/Anti-Christ dichotomy.
(5) The "higher" and "lower" Adam figures in some Gnostic legends. The higher Adam represents higher states of consciousness; the lower Adam, the unconscious.
(6) The two thieves crucified with Christ. One is destined for heaven (higher consciousness), the other for a warmer climate (unconscious).
Of course, there's more to the book than this equilibrium-of-the-Self aspect. But that aspect ties in with the main theme, the process of individuation (or ascending to a higher state of consciousness) in the Western mind.
Jung really assaults the reader here with his encyclopedic knowledge of religion and alchemy. A lot of his later work deals with esoteric subjects (alchemy, gnosticism, hermeticism, kabbalah). I found a few of the religious subjects, like the medieval "Holy Ghost" movement, to be pretty interesting in themselves, but unfortunately Jung discusses only those elements that relate to his psychological theories.

_Aion_ is part 2 of volume nine of Jung's collected works. Although _Aion_ is unquestionably a stand-alone work, ideally it should be read after part 1, which is _Archetypes of the Collective Unconscious_.
That said, _Aion_ is one of Jung's greatest works and is one of the first three that anyone who is new to Jung should start with. The first part deals with Christianity, and the significance of the death of Christ. This is treated as a legitimate, factual historical event, yet it is also explained as a collective pschic phenomenon in the general sense. The middle part of the book deals with ancient alchemy, and the symbolic parallels between alchemy and modern conceptions of psychology. This might sound dull, but trust me - you will be surprised to see the uncanny symbolic parallels between ancient magical practices and the most modern, up to date theories of the psyche. This is discussed at length in the section on the "Two Fishes", which is one of Jung's greatest essays (although quite difficult). The final section deals with quaternity symbolism, and features a wide array of strange diagrams. About 200 pages in, these diagrams will become more frequent, and the reader might get frustrated trying to see the significance of these rudimentary drawings. Personally, my advice is to stop reading after 200 pages. All of the useful essays are contained within these first 200 pages, while the final 50 or so pages contains esoteric essays which can be considered, at best, curiosity pieces for the insatiable, die-hard Jungian. The editiors wisely confined this esoterica to final few pages of the book. This is not to take anything away from the book as a whole. Overall, _Aion_ is extremely profound and insightful, and is a must read for Jungians and non-Jungians alike.