“Imagine that butterfly can only see in two dimensions. Its world is flat. If we asked it to describe the glass, it could only see that 2D shadow and tell us 2D things about it. But we humans, one dimension up, understand the glass's shape and depth. Our world is 3D. But what if we're like the butterfly, and we're trapped in what we can perceive? What if our world is just the light and shadow of some higher dimension's design?”