Jealousy

In response to Courtneys blog question "Question...that jealous anger that we sometimes feel toward the wealthy is a vile thing. What does that example say about humans? Can/does jealousy control us?"
I think jealousy controls some people, but that is because they allow themselves to be controlled by it. In some cases i would consider jealousy healthy because it influences you to work harder to gain the things you desire. Jealousy obviously has its bad effects on people as well. When it gets the best of people, murder, thefts, and other things can occur. I think it is natural to want the best for ourselves. The anger that is sometimes synonymous with jealousy has to be controlled before it gets out of control but i think that is more because anger is a dangerous emotion, not jealousy. As a whole, i think that society is not controlled by jealousy because there are too many other amazing emotions to experience.
question: Do you think good emotions can always overcome the bad ones?