"Vigil couldn't quite put his finger on in, 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. Sex and speed --- haven't they been symbiotic for most of our existence, as intertwined as the strands of our DNA? We wouldn't be alive without love; we wouldn't have survived without running; maybe we shouldn't be surprised that getting better at one could make you better at the other."
- "Born to Run" (Christopher McDougall)