With the nocturne number four we start a new opus, opus fifteen. This nocturne always
reminded me very much of ballade number two, which is also in the same key of F major.
Both of these pieces, they have a very pastoral first theme and
it’s interrupted by a very violent, stark, starkly violent second theme and
in this case, it comes so unexpectedly. It’s a little bit like the previous nocturne
with these two faces, but here the contrast is even more passionate.
That sounds so peaceful; and then, so disturbed.