Things have hard edges. The leaves on a tree are distinct from each other. Each pieces of gravel on a path is separate from the others. Faces in a crowd don’t blur together. Who knew?
Those who think there are no boundaries between right and wrong, true and false, beautiful and ugly; the blurrers of distinctions; those who think there are only shades of grey; the Hindu sages and New Age gurus who think “all is one”–these people are not just making philosophical errors. They just need cataract surgery!