Saint Song once again rolled the A4 paper into a cylindrical shape.
The little figure on the paper continued to dance as before, seemingly unaffected by the curling of the paper.
"Look, suppose this little figure is a two-dimensional creature, then he would have no way of seeing that his world has been rolled up. You understand this, right?"
"We understand," Su Yu and Sky Dragon nodded with difficulty.
"From this, we can deduce," Saint Song continued, "that we three-dimensional creatures also cannot see the shape of the three-dimensional world; only four-dimensional and higher-dimensional beings can."
"But we can see the shape of the three-dimensional world!" Sky Dragon timidly raised a hand, "For example, we see planets as spheres and meteorites as irregular, aren't these three-dimensional shapes?"
