《宋史·列传·卷九十五》
诸侯变易礼乐，天子一旦察觉就要诛杀他，这不是自我变化；刑法新建之国使用轻典，混乱之国使用重典，这就是世轻世重，不是改变。
诸侯变礼易乐者，王巡守则诛之，不自变也。刑新国用轻典，乱国用重典，是为世轻世重，非变也。
If a feudal prince changes the rites of music, and the emperor becomes aware, he must kill him, that is not self-change; newly established states use light edicts for criminal law, while states in chaos use heavy edicts, that is when penalties rise and fall, not change.