There are a lot of shapes, but there are three primary shapes as I like to think about it — Circles, Squares, and Triangles.

Circles tend to appear naturally, the sun, heavenly bodies, shapes of insects — (head, thorax, abdomen), flowers, stones, revolution, and rotation, and so on and so on. Circles are friendly shapes because we recognise them to be natural. Rounded things are also less likely to harm us due to its lack of edges. We also use words like bubbly, well-rounded, and spectacular to relate to things of warm and friendly characters. Also, circularity is associated with routines — the wheels of the bus go round and round, the hands on your clock go clock-wise, round and around, and around, and around we go. It's good. (Body?)

Squares are a bit less fun and friendly. They are always associated with characterisation and categorisation. In order for us to take things seriously, we have to be able to box them up, so-to-speak. We walk in and out of square rooms, we stare at glowing rectangles with information in it. Serious men, with square shoulders and square heads, speak with authority and knowledge. There's something reliable about the square — boring, yes, but reliable. Square books, square keys on the keyboard, t-squares, etc. etc. It's good. (Mind?)

Triangles however are enigmatic. Risky and dangerous. Everything about it is spiky, and you will get hurt playing with triangles. Triangles are always associated with mysticism and holiness — the spire, the pyramids, Newton's prism, the all-seeing eye, the Trinity. Three sides, three points, three angles. Warning signs are triangular; they point, they demand. And yet — here's the strange thing — the triangle is the only shape that cannot collapse. Push on a square, it buckles into a parallelogram. Push on a triangle, it holds or it breaks. The most threatening shape is also the most structurally sound. Perhaps that's why it hides in the bones of bridges, in the trusses of roofs, in the geodesic dome. For all intents and purposes, it seems impractical — all those angles, all that sharpness. Its points pierce, and wherever it appears, it creates hierarchy and direction. Something about it just makes you uneasy, but you can't really get rid of the triangle, can you? It's good. (Spirit?)