My favourite quote from ‘What difference does it make?’ is by Brian Eno:
Something happens when I’m working, which is that… for quite a long time I'm pushing the work. Pushing and pushing and pushing and trying to make it go somewhere. And then suddenly there's a change and the work is pushing me. That's the moment when I know something has happened, when I don't really have to make decisions anymore. It seems like I'm just being carried along.
This is exactly what I experience when I’m making music.