The next stage in Miksang, after the unconditional perception, is the most tricky. As we stand on the spot, engaging with the perception in front of us, halting the habitual dialogue in our minds that leads to labelling, judging, etc, we need to define the boundary of the perception.
The image in front of us is made up of elements (leaf, tarmac), some of which are part of the perception and some are not. If we include elements that are not part of the perception then we fail to capture what we see on film and we fail to express to others the perceptions we see. So we need to define the boundary of the perception.