This is a conundrum. Racing is about competition, and how can you have competition without comparison? Although I strive to place my best in races and to beat my competitors, ultimately my competition is against myself and improving my PRs. I wouldn't care if I placed dead last if I ran a sub-3:00 marathon! If I don't hit my time goals I am far more disappointed than if I don't win or place; in fact, I've had plenty of disappointing wins because of times. In training, I always compare my times to what I've done before, and sometimes that brings me joy while other times it does steal my joy.
Although I'm not yet quite sure how to reconcile this, I am definitely going to work on not letting comparison steal my joy. I'm not very good at living in the moment or rejoicing in the present - I'm always thinking ahead - but I think the more I can find joy in each moment the more fulfilled I will be, in running and in life. I shouldn't lose another moment on comparison - with running or with my career, parenting skills, marriage, helpfulness, productivity, possessions, etc. After all, we are all on our own journey and no one person has it all!
Rejoice in the Lord always. I will say it again: Rejoice! - Philippians 4:4