Tomorrow is another day, and there will be another battle!
I'm mostly a solo runner honestly. With that I feel that a lot of my runs are times of reflection. A time where I can shut everything out and just enjoy my own world. I let the energy just take over me and before you know miles have gone by. From my perspective the world slows down around me. My thoughts slow down even though my body is racing.
I use this time and energy sometimes to deal with inner challenges and it is a way for me to release some negative energy. I find though that this feeling of utopia merely ends after your run, it is the challenge of carrying on this energy into your every day life. It can be done, I always say, "dig deep".