From Flatland to higher dimensions
In 1884, Edwin Abbott, a Shakespearian scholar, published Flatland , a story about a land in two dimensions, where the inhabitants view each other and their surroundings as lines in a plane.
Only ourselves, who live in three dimensions, are able to see the plan of their houses. So that moving to a higher dimension enables us to distinguish between outer and inner spaces.
Could we pursue the argument, and reason about a four-dimensional world encompassing our three-dimensional world, in the same way as our three dimensions include the two dimensions of Flatland?