I believe I was shown the beginning of concrete forms in a vision. Everything I was seeing was symbolic of something, such as the car I was in symbolized the first particle which "came from nowhere" yet very much came from somewhere.

I might have explained it better / differently here:
memoirs from the continuum

The absence of light and dark, at the same time, would be one way of describing unity reality. "Dual" is two, so I don't know how you're going to get to singular reality using duality as a basis.
As to the existence of space, it may be easiest to say that it is a construct of rational mind to explain the "no-thing" which it perceives around the objects it sees. As "time" is the construct it uses to define the perceived distance between any two perceived events (sunrise/sunset), so "space" is the construct it uses to explain the perceived distance between any two perceived objects.
In unity reality, all exists now, and all exists here, as potentialities, unconditionally.

Are you referring to dark energy and dark matter with the above?

I posted a couple of minutes ago, but the post didn't appear, so I'll try again. With the above, are you possibly referring to dark energy and dark matter?

I don't know what the hell I'm talking about. I'm simply not willing to discount the possibilities here.

Most of us probably are not willing to admit the above, so congrats are in order for you.