Logic and Harmony
Yesterday, I wrote about the logic of things, partly because people sometimes use logic in that way, and also because I’m sometimes tempted to think that way but resist due to my training. In "Logic in the Wild," I discuss logic as the guardian of coherence, but I leave the definition of coherence open. This is intentional. If readers learn to engage with coherence rather than content, I’ll be proud of them, regardless of their interpretation of coherence.
One thing I’ve learnt while writing the book is that logic is much more than the symbolic game I played for twenty years. Once you start thinking about coherence instead of obsessing over consistency, you can shed new light on old, difficult questions or those dismissed by symbol manipulators. The case I want to present this morning is the way Ancient Greeks talked about harmony. Harmony, for them, was much more than pleasing sound ratios; it was a way of being, for the soul to be balanced, and for the universe to be organised. Literally, there were theories about the harmony of the soul and the harmony of the spheres. Music was just the introduction, exciting a person by making them feel harmony. As with other bodily pleasures, hearing harmonious sounds would inspire the youth to seek harmony within themselves and direct their attention to the universe, the movement of planets, and marvel at the universal harmony. Mathematics developed to treat music was thus constructed alongside mathematics for the motion of planets.
What does this have to do with logic? I realised that harmony for the Greeks is one way of seeking coherence. To find proportions of sounds that are pleasing and correlate them with the proportions of positions and movements of planets in the sky, and to understand this as the same kind of patterns that regulate the soul, is to seek coherence in the universe. It’s not about finding content or truth in things but seeking a coherent whole that makes sense of it all. And that, I submit, is essentially logical thinking. Furthermore, it is logical thinking directed at things, allowing us to talk about the logic of things.
