《战国策·韩三·段产谓新城君》
段产对新城君说： 走夜路的人可以保证自己不做坏事，却没有办法让狗不对着自己乱叫。
段产谓新城君曰： 夫宵行者能无为奸，而不能令狗无吠己。
Duan Can told Lord Xincheng: A night traveller can make sure not to do bad things himself, but he cannot stop dogs from barking at him.