I know what I have to do if I want to lose weight and stay healthy: eat a proper diet and exercise. All I've got to do is apply it.
There's never going to be a decathlon that you're going to have 10 events that your satisfied with. You're always, always going to be dissatisfied in something, and that always draws you back to try to retry that the next time you do a decathlon. It's like you go for the perfect 10.
Endurance is not just the ability to bear a hard thing, but to turn it into glory.