When you look at the light coming from a projector, the image it casts can be focused on the surface its aimed at to create a 'projection'.
The projection sits on the surface, creating an image 'plain'.
If you were completely unfamiliar with the physics of light and the mechanics of projectors, and you were to walk up on a projector casting a projection, you would have absolutely no reason to believe that one had anything to do with the other. - It would probably appear to you that there was a projector that was separate from the projection...
It might appear to you that the 2 things exist completely independent of one-another, unless for some reason the beam was interfered with.
Maybe the relationship between our thoughts and our realities work much the same way. This is why it's so confusing...
We can't tell that they are interrelated because of our current understanding...
We have ways of interrupting the beam and exposing the connection of our thoughts and experiences - just like a person can create shadow puppets in the light to expose the connectivity between the projector and the projection.
Put dust or smoke in between the projector and the projection, and you can see the beam.
- The more dense the object is, the more pronounced the shadow is.
There are ways to expose the beam of consciousness, too.
Different perspectives, beliefs, and paradigms can shift your reality as it relates to what's being experienced by others.
Awareness is a great way to manipulate the world of the external from 'within'.