In Case You Had Any Doubts...

... about just how expressive and pin point accurate music can be with regard to human emotion, please check out Sibelius's Valse Triste with Bruno Bozzetto's interpretation in animation. Sibelius illustrates in music through the simple use of minor and major just how close are sorrow and joy. And how the juxtaposition of the two can be unbearable and joyous at the same time.

Agree. There is more to Sibelius then the general classical world's consensus would have you believe. He ought to be performed more frequently.