What makes a song beautiful?

[ashtonfarell]

"After playing Chopin, I feel as if I had been weeping over sins that I had not committed, and mourning over tragedies there were not my own. Music always seems to me to produce that effect. It creates for one a past of which one has been ignorant, and fills one with a sense of sorrows that have been hidden from one's tears. I can fancy a man who has led a perfectly commonplace life, hearing by chance some curious piece of music, and suddenly discovering that his soul, without his being conscious of it, had passed through terrible experiences, and known fearful joys, or wild romantic loves, or great renunciations."