Sometimes the strongest desire for control is expressed precisely in letting go and waiting. Today at the dojo, my coach had me repeat a basic move until my muscles ached and trembled. He said, 'To master your body, you must first know its limits.' I was exhausted, almost spent, but that pure, unadulterated fatigue... it's addictive. It's completely different from the trembling when you're on your knees serving someone, pushed to a different kind of limit. Both are a form of surrender, of trust. But one is to make yourself stronger, the other is to... please. Which state of losing control do you prefer?