Jealously can be a productive emotion if one decides to harness its powers. It has the potential to push one beyond their perceived limitations. It can be a catalyst for self-improvement as it highlights what you yourself lack by viewing those qualities in another person. It drives the desire to obtain said qualities, if one is willing to accept the challenge.
The lazy and thoughtless tend squander this useful feeling by taking it out on the object of their jealousy. Not only is this an impotent projection of your own bullshit onto another person, its downright WASTEFUL. You can express this emotion by doing something that makes you BETTER, not by tearing down others. Tearing down others will only make you look like a hateful lunatic at the end of the day. It does not benefit anyone.
So hold your tongue and prepare to grow in your greenness the next time you feel that bile rising in your throat. Be productive, not destructive!