The only way to lose at this game is to give up. That’s the only mortal sin. No matter how many times you go off the rails, so long as you get back on course, you can’t mess this up. Fitness isn’t a contest with winners and losers. There are no deadlines or duels, distinctions or demerits. Fitness is like love, laughter, and learning—a wellspring of health and happiness to pursue purely for its own sake. Fitness isn’t fleeting. It’s forever.