According to Dogen, "The world is not a world of defilement. It is nothing other than the ancient mirror." And so, our practice is not a practice of purification. It's difficult to realize how totally that goes against the grain of what is called religious practice almost everywhere, including Buddhism, where practice can focus on separating the pure from the impure. Is attachment a defilement? Is sexuality a defilement? Or are they the ancient mirror?