即以其人之道，还治其人之身

Explanation: To deal with that person to return to deal with others is the man himself. 　　Source: Song Xi "Mean Annotations" Chapter XIII: "Therefore a man of government people, that is, eye for an eye, but also a man as body." 　　Examples: Status of this group of Jiandang, I do not know how many good people flexor injury, ~, is Kuaixin matter most. (Qing Chen Chen, "Water Margin after the transfer," the twenty-second back)