The point about art not being adequate if requires education is quite true... art should inspire human emotion, not intellectual emotion. That is what the novel and philosophy is for.
I was under the impression that the novel is a form of art? In answer to your point, classical music inspires human emotion through the application of intellectual emotion, and by combining the two, the whole becomes greater. In other words, you have to concentrate and listen hard to appreciate it.
I feel that I must explain to you how Classical music (generally) expresses emotion. Composers use climaxes in their music, forcing the listener to wait for minutes before finally giving the audience the moment they have been waiting for. Take Wagner - his climaxes are almost orgasmic (the American composer Virgil Thomas once said that he could hear the protagonists of the opera Tristan und Isolde 'ejaculation simultaneously seven times') and if you have never experienced 'that feeling' then you have never experienced the real power of music. Popular music on the other hand does not generally build up like this, instead slamming away repeatedly at a few chords, until their effect wears thin.
When you listen to classical music, have you ever heard the feeling of pain and greif?
Err... yes. I wouldn't listen to it otherwise. Ever heard of Mahler - now there's real grief.
You can really get that with the guitar, but not with a violin.
I'm sorry, but you are quite obviously talking out of your arse. Have you ever heard a real violinist playing a real violin concerto? Have you ever heard a string quartet? Have you ever heard the full force of a symphony orchestra live?
The violin produces one of the most pure sounds of any instrument bar the human voice, and you say it cannot express emotion. BS. Complete utter BS. Why do you think that the great composers wrote for the violin more than the guitar - oh, or do you mean the 'electric guitar'. It is an instrument so feeble that it cannot even play unamplified.
The guitar is about image, not sound.
"Unless thunder strikes, a peasant won't cross himself" - Russian proverb
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