>[!abstract] >The **tetractys** or **tetrad** is a mystical symbol consisting of one point in the top row, two in the second row, three in the third row, and four in the bottom row. It was an object of worship in [[Pythagoreanism]]. >[!related] >- **North** (upstream): — >- **West** (similar): — >- **East** (different): — >- **South** (downstream): — ![[related.base|no-toolbar]]