The spiritual world and our physical world exist cheek by jowl at all times. Spiritual beings can "see" us, but we can't see them. Obviously there is a barrier of some sort between the two of us, a bit like a two way mirror.
For what it's worth I think the barrier is space-time.
Sometimes during demonic deliverance sessions, the patients levitate, which is against the laws of physics. Early on in my Christian walk, I was copping some spiritual harassment. Amongst other things I visited a couple of people who had experience in that area, and they both told me that they had seen "patients" levitating up around the ceiling.
At Fatima in 1917, it had been raining for hours. Yet suddenly the ground and the clothes of those present were dry. I can't find it right now but I believe the energy required to vaporise all that water would have been around that of a 10 megaton nuclear explosion.
But there was no trace of any such energy being applied. Had it been, the crowd and everything around them would have disappeared in a fireball. God just removed the water by some sort of supernatural sleight of hand but I have no idea how He did so.
But then what is matter? A bunch of quantum wave functions?
I've often claimed that the night my father died he appeared in my room. We talked and argued and at the end he gave this blood curdling scream and then just disappeared.
But we were talking. As far as I could make out he was "talking", "seeing", "hearing" and "thinking".
Yet his body was lying dead in a flat miles away and wouldn't be found for another four days as it happened when one of my uncles turned up to tell me he was dead. So what was he talking, hearing, seeing and thinking with? He had no voice organs, no hearing pathway, no working eyes, and no brain.
Was I hearing literal sound waves or was the communication "spiritual" in some way? I don't know. It seemed "normal" if you can call talking to a dead person "normal".
As a final comment I think we'll learn to teleport based on quantum entanglement. Supposedly it's impossible, but modern technology has a way of moving past barriers in a way that most of us wouldn't even dream about. US physicist and engineer Dr. Robert Goddard got
liquid fuelled rockets to ascend around the height of a power pole in 1926, 97 years ago.
en.wikipedia.org
He and his team launched 34 rockets[3] between 1926 and 1941, achieving altitudes as high as 2.6 km (1.6 mi) and speeds as fast as 885 km/h (550 mph).[3]
By 1944 V2's were travelling 320 kilometres. Twenty five years later Apollo 11 landed on the moon, and returned safely. Voyagers 1 and 2 effectively entered interstellar space between 2012 and 2018. All based on
liquid fuelled rockets.
I wonder where we'll be in another 97 years if quantum entanglement experiments continue? But I also believe we'll learn to teleport material items long before we can move any living creature as I believe (I know) we have a soul or spirit which won't be so easily quantised.
Eventually I think we'll learn how to get around that too, which means we'll need to have at least a toehold in "spiritual physics" by that time.
I expect to see material teleportation in my lifetime, but i won't see living creatures teleported.
I'll have a very different point of view by then. Hopefully I'll be among the "great cloud of witnesses" with a ringside seat, passing around the celestial popcorn as we amuse ourselves watching the latest shenanigans of the human race.