Mathematicians tells us that it is easy to invent mathematical theorems which are true, but that it is hard to find interesting ones. In analyzing mu… - Charles Rosen

Chopin is the true inventor of the concert etude, at least in the sense of being the first to give it complete artistic form—a form in which musical substance and technical difficulty coincide.

Mendelssohn was the greatest child prodigy the history of Western music has ever known. Not even Mozart or Chopin before the age of nineteen could equal the mastery that Mendelssohn already possessed when he was only sixteen. Most astonishing is the nature of Mendelssohn's precocious talent: not only a gift for lyrical melodic lines and delicate, transparent textures, but, above all, a control of large-scale structure unsurpassed by any composer of his generation.

By this time Mozart had been dead for almost fourteen years and Haydn was too weak to compose. Beethoven was unchallenged throughout Europe as the greatest living composer of instrumental music. Even more, he was generally recognized as having surpassed his famous predecessors. This, of course, did not prevent critics from greeting each new work as a disappointment after his by then acceptable achievements of the previous years.