# Gnosis Arete is knowledge. But it can't be taught. It is tacit knowledge. The thing-in-itself is also mathematical. But in the end, you can only show the mathematical thing-in-itself. It's not arguable. That's what Godel's incompleteness theorems mean. You can't escape from them. The world is itself mathematical. So you can only show the math. Music is mathematical. But in the end, it just shows. And that showing is what art is for.