It would be a relatively safe assumption that most everyone has been envious of the achievements of others. At the very least, it would be very likely that you have wished that you could perform better, earn more money, or achieve a higher level of success. Bottom line, you have to believe you are capable of all of the above. Why not believe? Everyone has the potential to do whatever it is they dream of or want to achieve.
Although success is relative to each individual, the key to achieving success is the manner in which we take advantage of every situation and treat them as opportunities.