Because of jealousy you are in constant suffering; you become mean to others. And because of jealousy you start becoming phony, because you start pretending. You start pretending things that you don't have, you start pretending things which you CAN'T have, which are not natural to you. You become more and more artificial. Imitating others, competing with others, what else can you do? If somebody has something and you don't have it, and you don't have a natural possibility of having it, the only way is to have some cheap substitute for it.