Vigil couldn't quite put his finger on it, but his gut kept telling him that there was some kind of connection between the capacity to love and the capacity to love running. The engineering was certainly the same: both depended on loosening your grip on your own desires, putting aside what you wanted and appreciating what you got, being patient and forgiving and undemanding.
Christopher McDougall, Born to Run: A Hidden Tribe, Superathletes, and the Greatest Race the World Has Never Seen
running