[Coming over with the dry ingredients, he adds a cupful at a time to Jingyi's bowl while he listens to the explanation. It does make sense really. One would perhaps be too busy to learn things like this with a duty like that. It must mean that a more normal life would be impossible.

He can't feel sad though. He knows that Jingyi is happy.]

I think we all often don't think of things in a different way the first time we hear of something. We're used to what we know. But it's nice to learn about a new way of looking at something.