Non-Duality means non-duality. It's funny how, through our manic searching and desperate attempts for control we can very easily imagine separateness in our lives. We have this in-built tendency to create very subtle conditions for Truth. We may understand intellectually that everything is One, but through our experience we always conjure up exceptions to that. In this way we tend to try to exclude what we don't want, or create some condition that prevents someone or something else from being whole. But, non-duality means non-duality...just because a person may not know all the spiritual languages, or be able to astrally project themselves doesn't mean that they aren't just as much the One as anything else.
In our truly natural state, which is just right now, there is nothing excluded from the totality of existence. But the mind would believe otherwise, the mind would organize and interpret experiences down to the nth degree, hoping to somehow get a grasp on the eternal and unbound~ but it can't be done!
Non-duality is the relaxation of the mind to the essential truth that there is nothing to fix, nowhere to go, nothing to become...
Non-duality is the basic nature of our Being, that aspect of our Being that includes everything. The aspect of of our Being that isn't concerned with analyzing reality, or making assumptions based on false evidence.
Non-duality is the direct experience of your own Self, and the recognition that your own Self is in its essence no different that anything else.