Music is like love - it is like the love between a man and a woman - it is greater than the sum of its parts - it is an expression of love. This is why people pay for music - why those who can produce it are lauded. It is an expresion of love or hate or any emotional part of us. This is why if it is out of self obsession then it is not eternal - it is a moldering steamy pile of poop.
The best music is an expression of love. The best music is an expression of Love that is born of a songwriter who knows God.