《墨子·49章 鲁问》
现在你侍奉鬼神，只有祭祀罢了，却说：病从那里来？这就象百门只闭了一门一样，却问：盗贼从哪里进来？
今子事鬼神，唯祭而已矣，而曰： 病何自至哉 ，是犹百门而闭一门焉，曰： 盗何从入 。
Now you serve ghosts and spirits only by offering sacrifices, but then you say: Where do my misfortunes come from? This is like closing all the doors of a house except one, and then asking: Why do thieves enter?  