Writing is the solid form of language, the precipitate. Speech comes out of our mouths, our hands, our eyes in something like a liquid form and then evaporates at once. […] Yet language can also solidify—into iridescent, sharp, symmetrical crystals, or into structures more like hailstones or shale beds or mud.

Robert Bringhurst, The Solid Form of Language: An Essay on Writing and Meaning

Does mathematics have a liquid form? It is a difficult language to speak. Unlike natural languages, it flourishes mostly in its solid form. (Though I do remember awaking many years ago from a dream in which some repeated event had occurred to me as a repeated 1-drop on a list.)

Stephen Taylor, “Liquid Mathematics”