Butterflies and creativity are similar. They come and go somewhat erratically, you never quite get a hold on them, if you want to keep them you have to kill them. I love butterflies, I used to raise them.
This could become the chorus of - rather mean - a Rock piece:
hold your grudge
stick with your misery
hold your grudge
make it your destiny
holding your grudge
I put it in my scrap "book". We'll see.