Jealousy

When a person is jealous, it means they are not able to reconcile with their own inferiority complex. But understand two things: first, you are not necessarily inferior to the person you're jealous of, and second the person you're jealous of is not necessarily superior to you. It's your own perception that is deceiving you …

Utility

Human is the only animal who craves more than needed.Greed and jealousy has advanced us in all aspects of life; but it has also taken away the value of and respect for moderation from us at the expense of enmity and hatred within the species.