"Once we commit to action, the worst thing we can do is to stop. What will keep us from stopping? Plain old stubbornness. I like the idea of stubbornness because it's less lofty than "tenacity" or "perseverance." We don't have to be heroes to be stubborn. We can just be pains in the butt. When we're stubborn, there's no quit in us. We're mean. We're mulish. We're ornery. We're in till the finish. We will sink our junkyard-dog teeth into Resistance's ass and not let go, no matter how hard he kicks."