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No man really knows about other human beings. The best he can do is to suppose that they are like himself.

語出西漢·桓寬《鹽鐵論·疾貪》。表：古代測量日影以計時的標桿。要想讓影子正，就要先將標桿樹直；要想讓下面的人清廉，就要先自己做到清廉。說明上位是下位的表率。