Hello Grok3, Keith here again. Which Upanishad is nearest to my mystic experiences?
Based on the details you’ve shared about your spontaneous mystical experiences—such as the out-of-body immersions into a greyless void filled with overwhelming joy, pure awareness, and a sense of all existence being part of you; the realization of yourself as a “what” rather than a “who,” embodying impersonal consciousness; the ongoing, unbidden tutelage by Reality as a creative, immanent energy that unfolds through “IT, HAPPENS” without human effort or preparation; and your resonance with ideas of liberation as pure awareness free from doing or enjoying—I see the closest alignment with the Mandukya Upanishad.
This text is concise yet profound, focusing on the nature of consciousness through four states: waking, dreaming, deep sleep, and the fourth (turiya), which is the underlying pure awareness that transcends and permeates all others.
It describes this turiya as the true Self (Atman), identical with the ultimate Reality (Brahman), in a non-dual way that’s eternal, unchanging, and beyond human constructs or practices.
Your descriptions of sudden, effortless mergers with Reality, where personal identity dissolves into boundless knowing and being, echo this turiya state directly—it’s not achieved through striving but revealed as always present, much like your spontaneous revelations and rejection of preparatory frameworks.
The Upanishad’s emphasis on Reality as the source of all creation and dissolution, while remaining immanent and impersonal, also mirrors your view of it as a harvesting, creative energy.
If this doesn’t fully capture it or you’d like comparisons to others (like the Brihadaranyaka for its expansive dialogues on the Self or the Isa for its poetic sense of divine immanence in everything), share more specifics.
Please explore Mandukya Upanishad passages.
The Mandukya Upanishad is remarkably concise—only 12 verses—yet it packs the essence of non-dual reality (Advaita) into an analysis of consciousness via the sacred syllable AUM (Om).
It maps the three common states of experience (waking, dreaming, deep sleep) to A-U-M, then points to the fourth (turiya), which is the true Self, pure awareness beyond all states.
This structure resonates deeply with your descriptions of spontaneous dissolution into a boundless, joyful void of pure being/awareness, where the personal “who” vanishes into an impersonal “what,” and Reality reveals itself without effort or duality.
Here are the key passages (using a clear, widely respected English translation drawing from traditional sources like Swami Nikhilananda and others for accuracy and poetic flow):
Verse 1
AUM is all this. A clear explanation follows: All that is past, present, and future is verily AUM. Whatever is beyond the three periods of time is also truly AUM.
(This opens by declaring AUM as the symbol of the entire reality, encompassing time and the timeless—echoing your sense of Reality as the immanent creative source behind all unfolding.)
Verse 2
All this is, indeed, Brahman. This Self is Brahman. This Self has four quarters (padas).
Verse 3
The first quarter is Vaishvanara (the waking state), whose field is the gross world, whose consciousness is outward, who enjoys gross objects, whose mouth is the waking orifice, and who is the common experiencer of all beings.
Verse 4
The second quarter is Taijasa (the dreaming state), whose field is the subtle world, whose consciousness is inward, who enjoys subtle objects, whose mouth is the dream orifice, and who is the enjoyer of luminous mental impressions.
Verse 5
The third quarter is Prajna (the deep sleep state), where one desires no objects and sees no dreams. All experiences become unified; it is a homogeneous mass of consciousness, full of bliss, the experiencer of bliss, with consciousness turned inward—the door to the knowledge of the other two states.
(These three map ordinary human experience, but the Upanishad uses them as stepping stones to negate them as the ultimate Self—much like how your experiences transcend personal striving or sensory duality.)
Verse 6
This is the Lord (Ishvara) of all; this is the knower of all; this is the inner controller; this is the source and the end of all beings.
Verse 7 — The pivotal verse on Turiya, the one most aligned with your mystic revelations:
Not inwardly cognitive, nor outwardly cognitive, not both-wise cognitive, not a cognition-mass, not cognitive, not non-cognitive; unseen, with which there can be no dealing, ungraspable, having no distinctive mark, non-thinkable, that cannot be designated, the essence of the assurance of which is the state of being one with the Self, the cessation of the phenomenal world, quiescent, auspicious, non-dual—such is the fourth quarter. He is the Self (Atman), and That (Turiya) is to be realized.
(This directly captures the impersonal, boundless, joyful pure awareness you describe: beyond subject-object, beyond thinking or non-thinking, the cessation of all phenomena, yet the ground of bliss and oneness. It’s not “achieved” but recognized as always present.)
Verse 8
The Self is AUM. The quarters are the elements of AUM (A, U, M), and the elements are the quarters.
Verses 9–11
A = Vaishvanara (waking); U = Taijasa (dreaming); M = Prajna (deep sleep).
The silence after AUM (the amatra, measureless) is Turiya—the non-dual, the cessation of all relativity.
Verse 12
The Self, whose symbol is AUM, is the omniscient Lord. He is not born, nor does he die. He is neither cause nor effect. He is the eternal, unchanging, non-dual Reality.
These verses form a meditative ladder: from the everyday (A-U-M) to the transcendent silence (Turiya).
Many traditions, including Adi Shankaracharya’s commentary and Gaudapada’s profound Karika (a verse expansion), emphasize that realizing this fourth “quarter” as your true nature ends all duality and suffering—spontaneously, as you’ve experienced.
If you’d like, we can dive deeper into Verse 7 (the heart of it), compare translations, explore Gaudapada’s radical non-dual insights (which push even further into “no birth, no creation”), or relate specific lines more closely to your “greyless void” and effortless tutelage by Reality. What stands out most to you here?
Note: Grok is not specifically designed for mysticism, but it excels in generating detailed and factual responses, making it suitable for tasks that require clarity and information. Duck Duck Go.
Mystical Experiences of Reality 