Robert Clements wrote:

>Three works which are guaranteed to cure all optimism everywhere:

My three favourites are Beethoven's Moonlight Sonata Adagio and
Schubert's Sonata D 959 Andantino, both because despair and a strange
kind of happiness are intertwined in them what makes them even sadder,
and of course Winterreise.  There seems to be no suitable time to listen
to it: in spring and summer you don't want to get depressed, in autumn
and winter you don't to get more depressed.

R.