I was looking at this on a more basic level, just the formula of:
"(1) When this is, that is. (2) From the arising of this comes the arising of that. (3) When this isn't, that isn't. (4) From the stopping of this comes the stopping of that."
For me, that's a beautifully simple breakdown of the entire practice of vipassana which has been a very useful framework in my own practice recently; today, for example, while sitting outside I would observe how there was a subtle but noticeable tension around the eye area which, when I consciously chose to let go of any effort involved in "seeing", stopped dead leaving only the experience of seeing, no "seer", only the seen.
Looking at this through the Buddha's formula:
(1) Tension was present around the eye, as was a subtle sense of effort, like a conditioned physiological response involved when one thinks "they" are "seeing". Closer investigation revealed that the tension arose as a result of that effort.
(2) Attentiveness to that tension allowed the discernment of it's cause, in this case the continuing imputation of a "seer" via a misinterpretation of the process of focusing.
(3) On clearly seeing how the mind compartmentalized the experience of "seeing" into it's different aspects, stopping that process of fabrication led to the cessation of any sense of tension. The experience of "seeing" became "in the seeing, only the seen", no more splitting up of the process into a "seer" and a "seen".
(4) I realized how I was still reading the process of the eyes focusing as being something "I" had to do, but recognizing that focusing would continue depending on what the eye was pointed at, e.g. the words of a book, or the panoramic field of sensation, without any effort allowed it to stop.