" Running is many things to me: survival, calmness, euphoria, solitude. It is proof of my corporeal existence, my ability to control my movement through space if not time, and the obedience, however temporary, of my body to my will. As I run I displace air, and things come and go around me, and the path moves like a filmstrip beneath my feet. "
― Audrey Niffenegger , The Time Traveler's Wife