With copious evidence ranging from Plato's haughtiness to Beethoven's tirades, we may conclude that the most brilliant people of history tend to be a prickly lot. ↗
Imagine if Beethoven had a tape recorder. Then you'd know exactly what he meant. Maybe he meant 'Da da da da' instead of 'Boom boom boom boom!' Who knows? ↗
If a professional musician in a symphony orchestra is playing Beethoven. But this particular orchestra have played this particular chestnut so many times, they can play it in their sleep. Does the genius remain present in the music or not? ↗