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In this "Lessons" episode, we're talking about what you're really training at the gym: It's 6 AM, you don't want to go, you go anyway—that moment trains everything else in your life. If you can't make yourself work out when nobody's watching, you can't make yourself do any hard thing when it's optional. Here's why the gym is just practice for forcing yourself to do difficult things—and what it means if you keep quitting.