To me it is the ability to see the world ego-less having the mind shut down the default mode network and the experience of total infinite oneness with no separation of a you and other like the big bang where everything that is, is a non dimensional point with infinite density.
Yeah, ya pretty much nailed it.
Do you practice meditation, Brokeback? I have in months past and enjoyed some benefits from it. I just did Tai Chi this morning with my wife, and I would like to start Aikido soon.
The word "mystical" increasingly seems synonymous with "metaphorical" to me, but has a lot to do with our physiology and psychology as we go through with this.
I also find doodling sacred geometry, including Metatron's Cube and the Tree of Life and the golden ratio, to be very very relaxing and soothing. They're also very helpful in art.