No different in essence from the boundary between the “inner” and “outer” of another apparent “thing” – an eddy in a river.
A wave is not what it seems. It appears to be a discrete entity – a wave composed of water – but this is a misperception. It is entirely true to say that a wave has no existence at all other than a zone of relationship between (say) water and air. What it is is an outline of relationship itself – made visible and manifest. And it cannot be considered anything else. The shape which the water takes on corresponds with absolute precision to the shape of the air, and each is determined solely by their relationship with one another. This is only possible because they are two aspects of a single reality.
Both are one together as the communicating medium of reality itself, and cause and effect moves between these seeming parts. It moves with perfect freedom and absolute fidelity, and this is possible only because together they are a single reality.
No matter how intense the commotion at this boundary, the two cannot separate. Since they are not and cannot be separate, they must negotiate their relationship together, and it is simply this “relationship” which appears as this expression of reality known as “waves.”
Relationship then is nothing more than the “shape” of the interface which becomes visible or perceivable at the boundary where two apparently separate aspects of reality intersect.
Oneness and: (The seeming parts of reality + the perceivable “shape” of the interface between them (relationship)) are therefore entirely one and the same thing.
Or: (The seeming parts of reality + the perceivable “shape” of the interface between them (relationship)) are the movements of a single reality.
Waves are miraculous: their seemingly infinite variety. That such beauty can seem to fade away – yet complete certainty is preserved that they will reappear – exactly the same yet entirely different – effortlessly and without seeming plan.
Here is how this is possible: Miraculous complexity is held within the simplicity of a single oneness. What seems to be separated but is one has no choice but to be in relationship, and the “miraculous” is simply this appearance of relationship playing out at the seeming interface between them.
Since no apparently separate aspect has ANY possibility or ability to assume a “shape” or “movement” which does not maintain it in perfect absolute relationship or interface with everything else, the appearance of the apparently miraculous – such as beauty, symmetry, coordinated motion, call and response, cooperation (or competition) symbiosis (or parasitism) – become entirely easy and inevitable.
“Your body” is simply the perceivable “shape” of relationship.
There is NOTHING about it’s structure (eyes, ears, arms, hands, stomach, lungs), or it’s behaviors (speaking, hearing, seeing, moving) that can be considered anything but relationship made visible – at the interface between those physical aspects of reality which are experienced as the body and those which are not. “You” ARE relationship made perceivable.
The appearance of the miraculous set of relationships that seems to be “your body” then, is simply an example of the inevitable miracle. All that is required is the manifestation of “reoccurrence” as one aspect of relationship, and some form of the miracle of evolution is entirely inevitable. The miracle of “bodies” then, arises just as effortlessly and inevitably, and with the same infinite possibility for variety as do waves.
All this is also the reason why we do not really have any choice but to deal with one another.