No harm done
as long we can accept each others minor lapes its all going to be fine
Back to my earlier point, though:
If someone wants to demonstrate what they "know" to others, then I think if would usually be a matter of three questions the person can ask themselves:
- do I really know it?
- How do I know it? What justifications do I have?
- How can I demonstrate to others that those justifications are real?
As an example, your OP talked about demonstrating that you "know" that can "see [the spiritual realm] without physical eyes." Well, what would it take to demonstrate this, either to yourself or others?
To see how, consider how a physical sense could be demonstrated. Imagine that you were the only person in the world who could hear sound. How could you demonstrate this to others who can't hear?
- first you could start with a theory of what sound is: rapid changes in air pressure. Presumably, these people would already have accepted that air exists and can vary in pressure, so you're off to a good start.
- you could then establish a correlation between what's in the environment and what you can hear. You could tell the experimenters how you can tell the difference between a tree rustling and water running, and between the steps of an adult vs. The steps of a child.
- the testers could, well, test that you really can distinguish between different things using sound. They could blindfold you and place you near different sound-producing objects to confirm you can tell them apart.
- while all this is happening, the testers could independently verify that something real is happening. Even though they can't hear the sounds, they could measure them with instruments and see a correlation between what you say you hear and their readings.
I would expect that a new sense could be demonstrated in a similar way. A deaf person might not be able to hear sound, but they can see readings on a sound meter. A blind person might not be able to see light, but they can feel the difference on their skin between being in the sun and being in the shade.
For phenomena that actually exist, there are always ways to measure or detect them that don't involve experiencing them directly.