"In a word I feel myself the most unhappy and wretched creature in the world. Imagine a man whose health will never be right again, and who in sheer despair over this ever makes things worse and worse instead of better... but I have tried my hand at several instrumental things... in fact, I intend to pave the way towards a grand symphony in this manner." These extracts from a letter of 1824 epitomize to me the paradox of Schubert, the manic-depressive composer. On the one hand his music has that world-weary element of profound grief - 'the most wretched creature in the world' - and on the other a life-affirming exuberance bordering on the manic that characterizes the Wanderer-Fantasie and parts of the D major sonata D.850.