To me all of this is just rationalistic talk. If you put what he says under the scrutiny of some idealist philosophies it would shatter.
Of course there is no way to DENY what he says, because it is all facts. Very concrete and very solid. We could see it happen a million times, the chemical DMT make its course through the brain. But even this I think could be shattered by philosophy.
I would have to disagree with this man. Even though everything he says makes sense in his little "word game". In some aspects we don't even have proof "this reality" exists. So therefor if we conclude that this reality doesn't even exist outside our human senses, then why would hyperspace be any different? The experience is the same whether or not it is "real" but then again how do you even begin to define "real".
One thing that really stuck out to me is how he talked about controlling the elves in his visions, he tried to make them give him information that would not relate to him as a human.
There are two problems with this:
1) These "higher beings" or elves most likely contain such knowledge but they have "wisdom" not to tell him.
2) He cannot receive information foreign to the human mind, because he is HUMAN.
I could find more of what I disagree with but I do not wish to go on a rant. But I suppose what I am saying is even that he seems to have "proof" of all this. But I believe that humans understand very little, where he most likely thinks we are capable of understanding much.
It it two sides of a coin.
Thank you for the link though

I really enjoyed reading that