《汉书·传·公孙刘田王杨蔡陈郑传》
君子奉行道义，乐而忘忧；小人保全性命，悦而忘罪。
君子游道，乐以忘忧；小人全躯，说以忘罪。
The superior man, by the practice of virtue, makes himself happy without forgetting his sorrow; the vulgar man, by his love of life, forgets his misery without the practice of virtue.