Rules of resentment
Given enough time, resentment always surfaces. It just takes the right oportunity; when it comes, it is as certain as the nightfall. We can hide it in full conscience, knowing it is just there around the corner, pretending to ourselves and others that it doesn't exist. We can hide without knowing it, feeling it without understanding the feeling. Either way, we can keep it inside for a long time; we may even sometimes wonder how righteous it would feel to let it go and shove into someone else's face, while we don't. But when the time comes, when the right moment is upon us, we are helpless to keep it to ourselves.