It's hard not to get the impression that the fundamental principle of the world is periodicity. Movement in a circle, rotation, return. Everything in the world is either a cycle, consists of repeating cycles, or is part of a larger cycle. It seems that the world itself is also a cycle.

Cycles, like circles, have centers around which cyclic rotation occurs. The center of a cycle is its essence; its meaning. Although it varies. In some cases, such a simple geometric analogy does not work equally well and not every cycle center is easy to define as a point or axis. Not every cycle is closed, not every one is constant, there are disturbances, and so on. Perhaps that's why sometimes it's so hard to make sense of things.

In any case, music is an interesting example of cyclicality. Sound itself is periodic in nature, as is known. Higher levels of musical complexity are also cyclic. Rhythm, melody, harmony, and form. Everywhere there are bigger and smaller circles. Some are obvious, others are implied. Some are concentric. Sometimes interdependent and mutually generative, like an electromagnetic field. They can be more or less easily sensed. And in their complete absence in perception, one might say there's also a lack of sense.

And that's exactly what I'm saying.