Religion and mysticism are mostly conceptual
Reality can't be captured in concepts. After all, it's extremely unlikely that the human brain has evolved to be able to completely capture the nature of the reality that fashioned both the human brain and everything else in existence. But this doesn't take away the utility of concepts for making sense of the world. "Tree" is a useful way of describing the general nature of vegetative entities that vary tremendously in size, appearance, and such, yet share common characteristics. However, trees are part of the natural world. They are obviously real. Concepts that refer to entities which can't be observed…
