Does anyone have much of a feel for geometry and spatial reasoning in text? I've been trying to think about Euclid's elements - I think you can express some of it with just text, but most of it really only makes sense once you see a picture. Spatial reasoning with 2/3d objects being rotated/flipped/etc seems much harder to me. Any hints/references/papers would be welcome. I'm not an academic, I just get intrigued by ideas now and again!