Tree-ear is an orphan boy who lives with a man named Crane-man. They live under a bridge. One of Tree-ears hobbies is watching the potters in the village. Especially Min's work because he is the best in the village. One day when Min wasn't around Tree-ear snuck into his shed and looked at all his pottery. He ended up braking on of Min's pieces of pottery. He then worked for Min for 9 days to repay him for the broken pottery. It has been Tree-ears dream to make pottery of his own. He was very excited to work for Min because he might get a chance to make pottery. But instead he gets wood. He is sad about this but he still happy he can help. So when the nine days were over he asked if he would keep working for Min. Min agrees. Tree-ear loves working for Min and still has hope of making pottery. While he watches Min work he picks up things on making pottery. One day Tree-ear finds out that there is going to be a royal commissioner to pick a man to be a royal potter. It is the chance of a life time. Tree-ear has high hopes of Min getting picked. Min works very hard to make the perfect pottery. Another potter, not as good as Min, desires to use white clay and red clay instead of the normal gray clay. It turns out to have a beautiful color and design but is not as a precise piece as Min's. Tree-ear can tell that the commissionaire likes both of their pottery but only one can be picked. Tree-ear hopes that it is Min.
It depends on how you interpret it. While reading it, I interpret it as he means to say that love is as innocent as a person can make it. When he states she walks in beauty, he is most likely referring to the idea that she is beautiful and has a innocent lifestyle. My apologies if this is not the answer you are looking for.
