“Every morning in Africa, a gazelle wakes up. It knows it must run faster than the fastest lion or it will be killed...every morning a lion wakes up. It knows it must outrun the slowest gazelle or it will starve to death.  It doesn't matter whether you are a lion or a gazelle...when the sun comes up, you'd better be running.”

McDougall, Christopher.  Born to Run: A hidden Tribe, Superathletes and the Greatest Race the World has Ever Seen.  New York:  Knopf, 2009.  Print.