Just as Edwin Abbott’s Flatland (1884) imagines a flat, two-dimensional universe in which our three-dimensional perceptual world is beyond comprehension, Granville wants us to leave room for another dimension, one beyond our mortal apprehension. This higher dimension is seen to be heaven, where God dwells, and all events here on earth simply three-dimensional manifestations of that higher heavenly aggregate. And it is this interaction between dimensions which can explain so many seemingly supernatural parts of the Bible (episodes which one imagines might challenge a rationally minded scientist). He writes that “a man (three-dimensional being) who has been translated from our space into a higher-dimensional space will remain invisible to earthly beings until he returns again to our space”. This has concrete instances: when Jesus twice escapes the threatening multitudes by disappearing, he does so into this alternative, imperceptible universe. Likewise, when Jesus enters the room of the disciples without using a door (John 20:19-23, 26-29), he did so mediated by the realm of the fourth dimension. For Granville too, celestial visitors (whether angels, archangels, prophets), all emerge from this fourth dimension, only to disappear again into that other realm. The concept of hell can also be thought in terms of mathematics, though it is (of course) referred to as a "lower dimension".