"John, you know what is the most important ingredient on an Opera? There are a lot of important things on it: technique, aesthetics, vocal control, good writing... All of these helps on it's building. But they alone can't really do them. There's one thing, and one thing alone that build up the show, and that thing is passion."
The troll sighs.
"I've been watching the rehearsal, and I've seem that these guys have all the former elements I've said before. But they lack that special and fundamental one which is truly important. It would be a pity to see all that effort bearing no fruits, but hope made my eyes perceptive, and I saw your visage, John. I saw how you looked at that couple, and I can read your fiery passion: you, John, can save this spectacle."