Understanding music simply means not being irritated or puzzled by it. - Charles Rosen

Sonata form could not be defined until it was dead. Czerny claimed with pride around 1840 that he was the first to describe it, but then it was already part of history.

In almost every edition (and consequently most performances) of Chopin's Sonata in B flat Minor, Op. 35, there is a serious error that makes awkward nonsense of an important moment in the first movement. The repeat of the exposition begins in the wrong place.

Inaudible music may seem an odd notion, even a foolishly Romantic one—although it is partly the Romantic prejudice in favor of sensuous experience that makes it seem odd. Still, there are details of music which cannot be heard but only imagined, and even certain aspects of musical form which cannot be realized in sound even by the imagination.