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Thesis
Wang Xufeng and Wang Yun trace the earliest documentary starting point of Chinese tea virtue to Chapter One: tea is cold in nature and most suited to the 精行俭德 person. The important word is 最宜 — most suited. Tea is not the same for everyone; it asks something of the drinker.
This explains the order of the chapter. First the fine tree of the south, then soil, planting, picking and processing, and only at the end the human being. The material facts are preconditions; the ethical sentence is the conclusion. Without the material account, the virtue floats; without the virtue, the material account is mere natural history.
Lu Yu does not say that tea automatically makes people good. He says tea is most fitting for a person who is already capable of self-command. That is a stricter claim than a slogan.
Source: 光明日报·茶德与儒