The brain is substance, it has centers that are for sensing these things, what we see right now is in our mind, what we feel is in our minds, what we smell, taste, all of it is in our minds.
“Whomever” can make us see, feel, taste, smell things.
People have advanced very much also and who knows maybe they can do these things now as well, they are creating mind reading technologies at this point and now have machines that can make the mind hear things.
Was it real when i was grabbed on my shoulder? Yes, it really was, would anyone else have known, nope, but when they grabbed me or made my brain feel a grab on my shoulder i knew it was them, whomever they are. When i smelled sulfur i knew no one else smelled it but i knew it had a real cause, as in it wasn’t a chemical imbalance but was “whomever”.
When they visually appeared on a television in a vision i knew no one else would have seen them, but i also knew that when they appeared it was real, it had a conscious cause, they were manipulated my visual center in the my brain.
And i believe in other dimensions as well, and i also believe that there were inter-dimensional travelers back in the day that knew alot about them, but back in the day they would dub another dimension “the spirit world”, lost in translation and way to many different words used for the exact same things i suppose.