I really like this quote, very short and simple but yet so powerful and true.
"Desire is the most important factor in the success of any athlete."
Willie Shoemaker

Desire is key in my opinion in any sport. Especially in running because like in any high endurance sport it takes a lot of desire and will to follow through. I feel that no matter the outcome of your race, your event or your training that you should always keep your desire for it strong. Never lose sight of that. You will always be a better athlete and person because of it. Desire builds will and dedication. The more you stay dedicated the stronger the desire inside you grows. They'll be times you'll hit that wall and you want to give up. It is so much easier to give up but if you dig deep enough that feeling goes away. The desire comes through and suddenly you have a burst of energy to break down that wall. It is then that you realize that your hard work and training are paying off. Each time you break down those walls, your desire, will and dedication grows stronger. Every athlete must break down barriers and walls to get better, as such in life. So when people ask why you run so much or say that you are crazy for it. Just remember inside you are working for something much deeper than a workout. To me this is what is desire and dedication are all about.