You know Flatland, you read it too. Well, those triangles and those squares live in two dimensions, they don39;t know what thickness is. Now imagine that one of us, who lives in three dimensions, were to touch them from above. They would feel something they39;d never felt before, and they wouldn39;t be able to say what it was. As if someone were to come here from the fourth dimension and touch us from the inside- say on the pylorus-gently. What does it feel like when someone tickles your Pylorus? I would say... a mysterious flame.