E8 is a theory that describes how higher realities interact with this 3 dimensional reality, and what we perceive of as a point, is only one part of a higher dimension, in other words, they are almost describing the screen of this reality.
Confused, check out this short film about the E8 theory.
Hacking Reality (Official Film)
And is our Imagination a tool that interacts with these higher dimensions, that then gets expressed into this reality?
Though proving things by mathematics is great, one will not come to a greater understanding of this reality until they begin taking into account of consciousness and our Imaginations, and how we use it.
How To Feel Your Way Into The Wish Fulfilled – Neville Goddard
For at the moment, everyone seems to be trying to work out what the screen of this reality is, like trying to work out what the screen on computer is, and E8 seems to be an interesting theory in describing the screen of our reality.
To truly understand this reality, we also need to bring Consciousness and our Imaginations into the equation, otherwise we just walk around with our noses firmly held up against the screen