Jealousy is defined as feeling resentment against someone because of that person's rivalry, success or advantages.  

I think it's only human to be jealous.  And I admit to having harbored that feeling many times over my life. However, for whatever the reason, as I get older I seem to suffer those pangs far less often.  

Maybe jealousy springs from my competitive nature and maybe it fuels my ceaseless drive, but it is nothing to be proud about.