We do not know what the world really is. And most likely we will never know in our lifetime, unless some distant alien race comes to visit us and relays the universe’s details. Unlikely.
We do not know how big the universe is. Where does space end? Does it end? Is it infinity? What is beyond the universe? Is there something more than space?
Have you ever seen the movie Men in Black? In the movie there is a cat that is wearing a pretty orb hanging from its collar. And inside that orb is a universe.
I don’t imply that all that we know, and all that we can perceive is in a marble hanging from a cat’s collar, but we do not know what the universe is.
“All that we see or seem
Is but a dream within a dream.”
-Edgar Allan Poe / from: A Dream Within A Dream
Not that many generations ago, people thought the world was flat and the sun revolved around the earth. What will they know in as many generations ahead of us now? Will they discover that beyond all we currently know there is something altogether different. like an outer space to outer space?
My brain can run with this concept, or maybe its a lack of concept, for a while, but eventually I get stuck. I get stuck thinking about how big it all really is, and how we really, truly do not have a fracking clue. And then I get almost angered that we will not know, not in my lifetime, will we really know what is out there, what is beyond, where did it come from, why is it there, and how do we fit into all of it. 
All Things Krista 