Everyone is better off than I am-Battlefield of the mind

The author says she recently heard someone say that no matter how well we can do something, there will always arise someone who can do it better. This statment had an impact on her because she knows it to be true. And if this statemtn is true, then what is the purpose of struggling all our lives to get ahead of everyone else? As soon as we become number one, someone will be competing with us and, sooner or later , that one person will appear who can do whatever we're doing a little better than we can. (think of sports athletes, the current star holds the record but eventually someone somewhere is going to break that record). We need to set our minds to be happy for others & trust God with ourselves.