In his old age, Beethoven once heard a friend playing his thirty-two variations in C minor. After listening for a while, he asked, "whose work is this ?"
"Yours ." My friend answered.
"Mine? Will I write such a clumsy song ?" Then he added, "Ah, Beethoven was a fool at that time !" Goethe commented on Schiller's words, which completely applied to Beethoven: "He changes and grows every week.
Every time I saw him, I always felt that his knowledge, knowledge and opinions were better than last time ." For a period, Beethoven even wanted to destroy the songs "adellite" and "The Seventh duet in E flat major" (Work No. 20) he wrote in his youth ). This is by no means accidental. Like Beethoven, it can really be said that "you know the mistake of forty-nine when you are fifty.