NO ONE HAS EVER BEEN HUMBLED BY JOGGING.
If all we want to do is feel good about ourselves, jogging is the ticket. It doesn't challenge us. It doesn't test us. It doesn't exact a physical or psychological toll. Worst case scenario is, jogging may cause mild perspiration on color-coordinated sweat suits. But if we're willing to push ourselves into uncharted territory, a place littered with broken bodies and remnants of the human psyche, running may be what we're looking for. Without question, it dishes out more heaping helpings of humble pie than any sport we know of. Little wonder that so few people have the testicular fortitude to lace up and run like an animal.

- taken from a Pearl Izumi add in the March issue of Runner's World.