We begin by considering the three-part man. Truth goes into the head, Beauty in the chest, and Goodness in the belly. Truth is perfection, as in a perfect circle, or a perfect straight line. A circle includes and excludes. It includes a finite amount of space and excludes an infinite amount. It is a synonym for rota, form, shape, sphere, eidos (idea), and for True. When we think we encapsulate forms, shapes of experiences, in ideas. If all of our ideas correspond with the external forms we see in the world then they are true ideas. This is how a sane person can operate in the world.
The entire universe is arranged by rotation: electrons orbit their nucleus, planets orbit the sun, which orbits a central point in the galaxy. Simultaneously, every body is spinning on its own axis. “This turning around a centre is everywhere the same, so the one, universal law is rotation.” Whenever a circle is drawn, the ratio of the radius to the circumference is the same. “So one law rules all form.” This is the basis of classical philosophy.