I'm wanting to take a different approach to try to talk about this in a way that perhaps overcomes any language that alienates such as saying "higher" and whatnot. I think it will, hopefully, become clear in what context that is meant that avoids the connotations of value judgment.
Open_Minded just contributed something vitally important to this discussion. In referring to her scientist brother she said, "In his own way he knows silence as well, and experiencing silence." That is key. "Knowing silence". Let me explain and offer a different model to try to talk about this. Please bear with me.
If we are to try to tell someone what music is we normally speak of notes and melodies and rhythm. But what music really is, is blend of Sound and Silence. If there were no silence, there would be no ability to discern the sound. It would be a wash of noise. In fact, the greater the silence, the more pronounced the sound, the more distinct, the more beautiful it is. Silence creates contrast.
Within my meditation practices at home, the deeper my mind enters into quite, the more illuminated what is seen and experienced becomes by virtue of silence. At times, as the mind become utterly still and quite, each flame of a candle becomes a living beauty to behold, each object full of presence. I walk outside and hear a bird sing. In that moment all that is, is in the sound. Life sings out through that bird, but not just that bird, but that bird is an expression of All. It is that All. It is always there singing. But we don't hear it, see it, smell it, taste it because our minds cannot discern it because they are occupied awash in noise.
The mystical experience is about clearing away the illusion that the noise is reality, which we assume because its what we have acclimated ourselves to. We don't see the noise. We assume that noise is the way of things. Until you clear it away. Then, it becomes apparent. The noise was an illusion of reality. It hid reality beyond it. Reality is seen through Silence. It is the backdrop against which everything is see and experienced, against which everything arises. And without it nothing whatsoever would be heard, seen, tasted, or experienced. What is "beyond" this or that, is simply a degree of our ability to experience that Silence, and expose the world as it "Is", beyond the noise.
Now none of this has anything to do with ones intelligence, whether or not they are a mythic believer, whether they are a magic believer, whether they are a believer in the truth of science, etc. Everyone, and anyone experiences this world as it is at all times. Everyone. Bar none. But not everyone hears it or sees it with the conscious, waking mind. One can hear that same note playing every day, year after year, then one day something shifts, a moment of clarity arises and that note sings as it has never been heard or experienced before. It's the same note! But it's a universe within it, that was never seen before! He didn't go transcending off to some other realm "out there", but opened in himself to the world right here, always and ever just now. He experienced that Silence, through the object that was arising. Emptiness within form. Shunyata. You do not hear silence. You hear within silence.
Music is sound and silence.
How someone then tries to talk about there experience of that is then going to be against a mental framework of the world, whether that is mythical gods, or some rationalist framework, or in some metamodel of the world. But now we are talking about pencil drawings on a piece of paper. There are lines we draw that give the illusion of hierarchies (now we touching on my language here). But those hierarchies do not exist in reality. There is no higher or lower in reality, as these are simply ways we try to map these things out to talk about them in some fashion. They aren't hard, fast truths that we club each other over the head with. A stage or a level is really more like asking "how many trees can you see standing where you are right now". It's really more a matter of how much is one able to see at any given time. How much of the world are they able to include in their experience. How much of the data hitting them are they able to perceive.
The illusion of the hierarchical model is that we like to draw straight lines mapping a point A and a point Z with a line between them. The goal is to move more to point Z as the "highest" point. And this now comes to the paradox I've been trying to get at. That artificial straight line of 'lower and higher', is actually just points added to an expanding ring of circles drawn on a piece of paper with a pencil. Each wider circle takes in more of the surface area of the paper. At its widest ring, it is the fullest experience of "the world" as it covers the most area. But this is just the experience of the lead drawn on the paper. God, or Spirit, or Reality, or Emptiness, is not laying at the end of those lines! "It" is the paper itself upon which all lines are drawn!
It is the white paper, the silence, the emptiness that all lines are seen and experienced against. Without that Contrast, there would be no lines whatsoever. Every single point on that paper, is in contact with the paper! Every single point can see themselves against that paper when they can see beyond the marks of the lead of the pencil they identify with. It doesn't matter, when in time you have lived, how advanced or how simple of a person you are.
We exist. And we exist on that Paper. The more we see "Reality", is really more a matter of seeing what simply has always been there, at every "stage" of development in our lives. The only "higher" that exists, is really how much more fullness of the surface of that paper is experienced by how wide our circles are on the paper. But that paper does not change. It is the same paper at the smallest circle as at the widest circle. It is the same Freedom from the lines no matter where the line is.
When you experience that clarity and see "what is", you are experiencing Silence. Silence is nothing.