I find this certain sentence within this section of the reading to be actually a bit confusing to myself. The question that is being posed here is just something I don't quite understand. When the question of "don't you notice that the power of seeing and what's seen do have such a need?" is being asked, what exactly is the difference between the power of seeing and what's seen? I understand it is a very philosophical question I suppose, but what does the question and the difference between the two mean?