kennethreitz
ce93f429a2
Publish the Obsidian vault's Knowledge folder as /knowledge (881 notes, 67 folders), with a Knowledge item in the nav and footer. - scripts/import_knowledge.py regenerates data/knowledge from the vault: slugged paths, folder notes as index pages, wikilinks resolved to site links (or plain text), callouts, highlights, and Dataview tables rendered statically. Personal notes are withheld via an exclusion list plus a privacy guard. - tuftecms/core/knowledge.py builds a concept index from note titles and aliases. First mentions on ordinary pages link to their Knowledge note (capped, never in headings, code, links, or sidenotes); Knowledge pages list related notes and where they're mentioned across the site; other pages get a Related Knowledge block. - Knowledge URLs join sitemap.xml (so the sweep test covers them), never displace existing legacy slugs, list alphabetically, and mermaid diagrams render client-side only on pages that have them.
2.2 KiB
description, source
| description | source |
|---|---|
| The first solid — the least a shape can be and still enclose a world. | obsidian-knowledge |
Tetrahedron
The first solid — the least a shape can be and still enclose a world.
The Form
The tetrahedron is the simplest of the Platonic solids, four equilateral triangles joined into a pyramid with a triangular base. It is the minimum: no three-dimensional figure can be built from fewer faces, fewer edges, or fewer vertices. Four points suspended in space, each connected to the other three, define both the smallest volume and the sharpest, most self-contained of the perfect bodies. It is also the only Platonic solid that is its own dual — place a point at the center of each face and connect them, and another tetrahedron appears, nested and inverted within the first.
Because of its economy and its upward-pointing apex, the tetrahedron carries a quality of ignition. Its faces are all triangles, its angles keen, its form the least rounded and most piercing of the five. Where the cube feels stable and seated, the tetrahedron feels poised to move, a shape caught in the act of becoming.
Correspondences
| Attribute | Value |
|---|---|
| Faces | 4 |
| Face shape | Equilateral triangle |
| Edges | 6 |
| Vertices | 4 |
| Element | Fire |
| Dual | Itself |
Meaning
Plato assigned the tetrahedron to Fire, and the choice reads as inevitable. Fire is the sharpest and most penetrating of the elements, the one that transforms rather than rests, and the tetrahedron is the sharpest and most penetrating of the solids. In Alchemy Fire is the agent of change, the heat beneath every transmutation, the will that drives the work forward. The tetrahedron thus becomes the geometry of initiative and spark, the pointed origin from which all further building proceeds. To meditate on it is to contemplate the smallest possible completeness, the seed-form that already contains the logic of every solid to come.