《尚书·周书·洪范》
君王之所视察，就象一年包括四时；卿士就象月，统属于岁；众尹就象日，统属于月。
曰王省惟岁，卿士惟月，师尹惟日。
What the monarch observes is like the four seasons in a year; the Qing scholar is like the moon, belonging to the year; and the many Yins are like the sun, belonging to the moon.