Kindness begets kindness. When Suming first kept Park Cheol-bin, he was moved by the thought of treating his illness, even willing to use "Tai Sui" meat. Aside from some promises made to Park Jeong-ui, it was mainly out of compassion. There are many pitiable people in the world; if you don't know them or haven't seen them, it's one thing, but when a young boy who's more optimistic and in need of sunlight than most, despite his muscular atrophy, appeared before Suming, he couldn't think of any reason to stop himself from helping him.
In short, it was purely out of goodwill, with no expectation of reward. Unexpectedly, kindness was rewarded. Park Cheol-bin turned out to be a living encyclopedia, especially in the field of economics, where he had dabbled extensively. According to him, natural sciences study nature; while economics and politics are the top constructs of humanity, studying the human heart. In modern society, politics is, in turn, an extension of economics.
