Why is it has to be selfish?

Perhaps it has occurred to you or you have witnessed a situation whereby you or someone ELSE is fighting to proof to that  you/ he can really do to their expectations and even more. If you once witnessed that, and thought may be its your imagination, I' am here to prove you wrong.  Of late many people are filled with pride negative attitude and disbelieve that anyone else can be a hero given a chance and nature. This alone has lead to demoralization of talents and lose of strength better our living, while in the other hand has left others struggling their whole life trying  to proof the heroism deeply in them. Giving credit where due is a rule many do ignore and its not their fault, I mean we all have weaknesses but the difference is drawn when you don't accept and appear not to know that nobody will come and appreciate you when you don't yourself. So start from today to draw a line and differentiate what others can say or may say and what you think it is rightful for you, gain self confidence, believe you can always do better, keep off their critics and illusions and focus on what you want to be, at the end you will find A NEW DEFINITION OF SUCCESS. Everyone is selfish and whatever a good thing you do, will always wish it where them and same applies to believe, unless you do it yourself be happy and achieve a greater height or live your life proofing nothing,  die miserably unhappy and unworthily.