Let's move on to the commentary. Mumon's commentary says I approve the old barbarian's realization, but I don't approve his understanding. If an ordinary person realizes, she is a sage, if a sage understands, she is an ordinary person. So here Mumon is distinguishing between what he calls realization and understanding. Usually we use these interchangeably, realization understanding. But then, why does he distinguish between them? Well, this is just one of the skills one learns and working on koans is not to get hung up on the words, but to see what's behind the words. The whole koan system can be appreciated as a way to to learn to see through words and concepts. It is great practical value. To train in that way, and just in our daily lives, among every kind of person in every walk of life, people talking to us, or our family or kids or spouse when they're saying whatever they're saying, what are they really saying? What's behind that? So then let's make this commentary on its own terms where realization is different from understanding.