Understanding Holes 4
Here’s our square. A garden variety, "four equal sides – four equal angles" square. Can you see where this is leading yet? "Sine Qua Non." "That without which." So what is left if we take away everything not unique to the square? To see, take a look at the lower "drawing," the one which simple says, The "Square."
As you can see, squares do not exist in the physical world either. They exist only in the non physical world. Now go slow. This idea is still really difficult to grasp. Why? Because again, we humans define everything in our world by what we can see. Including squares. Now consider what this means about squares.