Absolutely. I was actually intending to write an essay on this very subject this morning; the unconscious mind must have stirred you so I'd share it here instead of elsewhere.
Let's look at it logically, first. Studies with split-brain patients have indicated that there is, in essence, a second, muted 'self' functioning beneath the ego, with its own preferences as to color, for instance, and its own abilities for problem solving. Parkinsons patients who hallucinate under the spell of L-Dopa often indicate that they have a 'companion' just off to their right, invisible.
The act of writing itself is an incredibly potent thing. It is something which everyone can do–everyone who can write thinks they can be an author, right?–and with very little practice you can easily get into the habit of getting into the gnostic flow of the work. Even writing a short non-fiction piece such as this may be enough to trigger it.
I wrote a magical book and am writing another one, though neither seem quite so on the surface; neither does David Bowie's ouvre seem to have magical contents on first glance, either. The thing is that I did not mean to write a magical book while I was writing it; I only realized that the effects of it, and the details of its structure, plot and character archetypes, were not only in line with the great work, but that its timeframe of creation (7 years, 7 rewrites) and various other details about it render it a kind of hypersigil. None of this was intentional and despite being a big fan of /x/ since the age of 14 I somehow did not become heavily involved in occult studies in earnest until the completion of the novel, until that time being mostly interested in Eastern philosophy. However, the effects of the book upon my life are thusfar undeniable; it has formed the nigredo of this cycle of my great work, and broken open the gates of change.
The thing is that the act of writing gives us a keen insight into the creation of the world. If you are familiar at all with the alchemical triad of Sulphur-Mercurius-Sal, you will realize with some consideration that the pattern presented fits perfectly with the act of writing. One begins with the four elements–air works upon water to produce Mercury, fire works upon air to produce Sulphur, water works upon the earth to produce Sal. Then, with the assistance of the hermaphroditic Mercurius, Sulphur expresses the masculine principle, which engenders, and Sal expresses the feminine principle, which is impregnated. From the masculine and feminine principles together, then, arise the perfect One. (If you're not entirely understanding this concept, I would strongly recommend reading Jung's collected works, volumes 9.1, 9.2, 13, and 14 in particular–if you can only pick two, pick 9.1 and 14.) Another way to think of Mercurius is as the 'he' in YHVH, married to both the Y and the V.
This exact same concept is applied to writing. The Sulphuric, masculine principle, the author, uses the prima materia, the hermaphroditic principle Mercurius, or language, upon the body of Sal, the paper. This kind of awareness of the process is very powerful for meditation, but far more powerful is the realization that comes with authors who have written enough hours, who are willing to let go of their ego pride and realize that they have little more to do with their work's creation than being diligent and providing an outlet for the unconscious mind. It is the duty of the author to learn as much as possible, from all things and people, that concepts buried in the unconscious may have the energy to rise to the surface and be expressed by our pens.
There are many uncountable mysteries related to writing, not the least of which being related to the simple fact that we are human vessels piloted on a source code of human language. The book 'Wired for Story', a book about writing, is incidentally highly philosophical in a way that lacks total self-awareness, but I would strongly recommend it to anyone in this thread. I also wrote an essay about the act of automatic writing and the power it gives one to connect to the godhead, available here: https://delilahmywoman.com/2016/04/05/a-non-fiction-essay/
Good health, brother. I could talk about magical literature all day; words are the most powerful things in the universe, because they are the only things, and even then, they are mere symbols through which we sort perceptions.