《汉书·传·武五子传》
天命变化无常，人对仁德的爱好，能使自身变得聪明而大显光辉；如果对仁义不去追求，就会使君子懈怠起来。
惟命于不常，人之好德，克明显光；义之不图，俾君子怠。
The mandate of Heaven changes unpredictably, and people’s love of benevolence and righteousness can make themselves become intelligent and distinguished; if they do not pursue benevolence and righteousness, they will become slack when encountering the noble people.