Life is indeed round

I have begun my morning walks at a nearby park. As I walked I would choose a walker walking faster than me and try to keep up pace or outpace him/her. I used to be so pleased with myself. Till I realized that the slowest person was ahead of me.. after all the park is round!! Whom was I competing with- myself or with someone else? I am happy when I compete with myself. I compete with another I end up being unhappy for there will always be someone ahead of me.
There will always be a better car or a better student or a better spouse ,better house, better job...I need to choose my standard and I have a choice to be happy satisfied or ...