When one shifts their perspective somewhat, it easy to see that lines of division (which are really all lines) can be seen as places where things meet; where everything connects.
At a quantum level, reality would look very different from the lines that we see in our everyday life. Talk about lines being blurred. When a person really looks, they can see how much more alike everything is than different. They can see how the lines can be blurred and how we are all connected.