"Without a functioning ego the individual would have no ability to interpret their experience." If you were an experienced mystic you would understand that you do not interpret the experience, the exprience inerprets you.
Only the conceptual mind is capable of interpretations. Experiences do not interpret. They don't have brains. This is like saying "running runs". It's nonsense.
Here's the thing about experiences and interpretations you don't see to be aware of. Experiences just happen, and they are just raw experiences without any meaning or understanding inherent to them. What happens at the moment of an experience is the human mind then almost instantly breaks the experience into two parts; object and subject. The question is asked "What was that?" (objective), and "What does it mean?" (subjective). Example, you hear a loud bang. The experience is sound hitting the ear. The mind asks what was the source (objective), and then asks am I in danger (subjective). That's an interpretation instantly performed by the mind, so fast you aren't even aware of the process. It's just the way reality is understood by you without awareness of the process.
BTW, I'd be careful about touting oneself as an "advanced mystic". I'm a believer in the saying that the more one knows the more one knows they don't know. I tend to agree with YmirGF that "Enlightenment" is not all that meaningful an idea. I see "enlightenment" is not this "end goal" you reach where everything is resolved and you have "arrived". Not at all in fact! I used to imagine this as many do. Rather now I see it as an loop of an infinite number of finite points that we go around and around on in an infinitely ascending and descending spiral all within the Eternal now. "Enlightenment" is just the beginning rather than the end. It's more the starting point, really. God is not a static point you reach. God is what you already are and are becoming.
In a "non consceptual" workings mind processing reality the processing speed of one's mind is so fast that self and relationships to self, experiences or otherwise, cease to exist. In a "conceptual" workings mind processing reality everything is slowed down so that the ego has time to interpret and understand the experience. And if the ego does not get this time, it then experiences a breakdown. YmirGF, you are not wrong
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What you are really describing sound to me like the unconscious and subconscious minds. One of the first things you discover as you begin to be able to enter into meditative states is how the unconscious mind speaks to the conscious mind, sharing its information with you, so to speak, because you have quieted the active "thinking" mind, the discursive dialog of mental objects, the texts of the self we have written an process like a script in our brains. The subconscious comes through in non-linguist symbols. This is where we begin to encounter dream-like imagery, subtle state experiences. Much of the information is the processing that happens all the time, all day, every day in our minds, but we aren't normally quite enough to listen directly.
This is really the goal of psychotherapy. To open to and listen to that understanding of ourselves we have going on in there all the time, but we either choose to not listen to, bury and suppress, or are unable to know how to fit within our current models of reality and self the mental objects we have constructed in our linguist minds allow us to see. They are constantly speaking, but we are unable or unwilling to listen and hear their messages to us. Meditation is the first step to opening to these hidden parts of ourselves, actively opening dialog, and the result is an enormous healing of the individual, and a significant increase in the intuitive mind, the psychic mind.
But that's not all. There is also the emergent unconscious, the inherent potentials in all forms which speaks in archetypal imagery. This is where YmirGF and I have a difference of opinion, one day I wish to explore further with him (nudge, nudge). This is to me a very, very important thing to acknowledge and bring forth as points of meditative focus. These are the forms of the very subtle, the forms of deities, bodhisattvas, devas and devatas. These open oneself to Self, and the benefit of this "2nd person" perspective, is that the ego-self is faced and dealt with directly, allowing one to not hide it are deny it which only results in further repression of parts of our self, rather than an integration and transcendence, which I feel is necessary for fully integrated enlightened mind.
To expand on this last point I'll quote from my favorite philosopher dealing with these areas:
But this is not God as an ontological other, set apart from the cosmos, from humans, and from creation at large. Rather, it is God as an archetypal summit of one's own Consciousness. John Blofeld quotes Edward Conze on the Vajrayana Buddhist viewpoint: " 'It is the emptiness of everything which allows the identification to take place - the emptiness [which means "transcendental openness" or "nonobstruction"] which is in us coming together with the emptiness which is the deity. By visualizing that identification 'we actually do become the deity. The subject is identified with the object of faith. The worship, the worshiper, and the worshiped, those three are not separate' ". At its peak, the soul becomes one, literally one, with the deity-form, with the dhyani-buddha, with (choose whatever term one prefers) God. One dissolves into Deity, as Deity - that Deity which, from the beginning, has been one's own Self or highest Archetype."
~Ken Wilber, Eye to Eye, pg. 85
The confusion comes when one does not realize that there are two different mind processing realities. When you step through the third Dharma Seal you go from a "conceptual" workings mind processing reality to a "non conseptual" workings mind processing reality. And for some reason folks are calling this "non conceptual" workings mind processing reality "Enlightenment"
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I think you are confusing the 3rd Dharma door with the things I just described which are really just your conscious and subconscious minds, the verbal and non-verbal mind, linguistic and symbolic, left hippocampus and right hippocampus. What you seem to be describing is just moving to the Witness state. I don't consider the Witness state itself to be enlightenment.