"If you think about it, the only way you can really talk meaningfully about progress is by reference to a tradition. It's by reference to how far we've gotten up to this point that we can say, okay, we're making progress. Progress, if it is meaningful, can't just mean novelty. It can't just mean doing something different than what we've done before. That means it's got to be gauged by what has been done before, and it's in light of that that we say we're making progress. And the deeper our immersion, the harder we realize it is to make progress."