He was onto something. Something huge. It wasn't just how to run; it was how to live, the essence of who we are as a species and what we're meant to be.

I have the idea that running shoes are based on a kind of cult idea - that our feet are flawed and we need shoes to correct those flaws. The shoe companies are in the business of selling shoes. But there's no evidence from running shoe manufacturers that they're right. There's no scientific data that running shoes reduce injury.

Distance running was revered because it was indispensable; it was the way we survived and thrived and spread across the planet. You ran to eat and to avoid being eaten; you ran to find a mate and impress her, and with her you ran off to start a new life together. You had to love running, or you wouldn't live to love anything else. And like everything else we love-everything we sentimentally call our 'passions' and 'desires'-it's really an encoded ancestral necessity. We were born to run; we were born because we run.

There are two goddesses in your heart,” he told them. “The Goddess of Wisdom and the Goddess of Wealth. Everyone thinks they need to get wealth first, and wisdom will come. So they concern themselves with chasing money. But they have it backwards. You have to give your heart to the Goddess of Wisdom, give her all your love and attention, and the Goddess of Wealth will become jealous, and follow you.” Ask nothing from your running, in other words, and you’ll get more than you ever imagined.

We're constantly told that running will ruin our knees and outrage our hearts, but for nearly all of human existence, it was associated with freedom, vitality, and eternal youth.

When it comes to mentors, you can't beat survival.

You don't have to be fast. But you'd better be fearless.