Classical music isn't meant to be listened to once and then forgotten. It is complex and many-layered music that is meant to be learned. But what does it even mean to "learn" a work of classical music? If you were in a music appreciation class, you might be subjected to a "needle drop" test, where the teacher plays a brief section of a symphony for the class. If you can name the symphony and the composer (and likely some other trivia like the year it was written or the year the composer was born or died), congratulations! You've "learned" that piece. A professional musician would say he "learned" a classical music work once he can play--and play well, hopefully--all of the relevant parts in that symphony assigned to his instrument. But for those of us who are not in class or working as pro musicians, those of us with busy lives and a limited amount of time to dedicate to classical music, I'll submit a more entry-level definition of w...
"The study of the history of music and the hearing of masterworks of different epochs will speediest of all cure you of vanity and self-adoration."