There are two overlapping diagrams inside the Enneagram itself. The triangle connects points 3, 6 and 9. This is called the “Law of Three,” which illustrates three forces present in all actions or events: 1) the affirming or initiating force at point 3, 2) the resisting or developing force at point 6, and 3) the harmonizing or reconciling force at point 9. We also can talk about this as thesis, antithesis and synthesis. In religious traditions, we may find this described as the Trinity.
The other internal diagram is a hexad (group of six), which connects the points 1-4-2-8-5-7 with its own flow pattern. This illustrates the “Law of Seven,” indicating the necessary steps for accomplishing tasks or projects, and their interconnections. Some people use the diagram and its two flow patterns for what is called the “Process Enneagram,” which can help organize major projects and systems within an organization.
Various books written about the Enneagram explain how it expresses the “natural laws.” In our work with Enneagram types, we are interested in the theories about the symbol and the lines, but are mostly concerned with what is practical and useful for our own personal development.