I was able to see this clearer with some inquiry. Let's take the example of the 'tinnnngggss' from a bell. That sound's conditions are the bell, the stick, the air, the ear drums. If you take any one of these things away there is no sound. Now looking at the sound, can you separate out which part of the tings is the stick, the air, the bell? There is no dividing line in the actual experience of the sound. If you take it further, who crafted the bell, who bought it, all the air those people breathed. Take any of those away and there is no sound. Again you can't find any dividing line between all these conditions in tinnnngs. So all those things are actualized in that ting. Let that experiential feel soak into something going on right now. As you hold the view of conditionality, the subject-action-object view is released. Expand that view to everything and you have interpenetration and non-obstruction. Nothing obstructs anything else, each sound expresses all. How could one thing have a boundary with other things to obstruct in the first place?