In his tower overlooking the river Neckar, Hölderlin had a piano that he sometimes played so hard he broke the keys. But there were quiet days when he would just play and tilt back his head and sing. Those who heard said they could not tell, though they listened, what language it was.
After reading this passage I believe Holderlin was in fact a genius due to his manipulation of his environment. Most people live their lives wishing they could do something else or be a different person or maybe even more of themselves. They cant achieve this because they cant manulpulate their environment, unlike Holderlin. He would play his piano so violently the keys would break but other days softly so that people can listen. He made his environment ( people) hate the loud noisy days so they would appreciate the quiet days and his singing. It works because even though they don't understand what he is saying they still listen. Is this kind of manipulation needed to be considered a genius?