What is delightfulness?

Delight strikes when we recognize patterns but are surprised by them… It’s seeing a beautiful landscape and thinking all is right in the world… A perfectly closed-off plot, with just a couple of loose threads. A picture of a farmhouse, but the paint is peeling. Music that comes back to the tonic note and then drops a whole step further to end on an unresolved minor seventh… It’s like the smile from a beautiful stranger in a stairwell—it’s fleeting. It cannot be otherwise—recognition is not an extended process.

– Raph Koster