《论衡·卷六·雷虚篇》
有人说： 天已经随着声音向东、西、南、北移动了，只因为云雨昏暗不明，人们不能看见罢了。 
或曰： 天已东西南北矣，云雨冥晦，人不能见耳。 
Someone said: “The sky has already moved to the east, west, south, and north with the sound. People cannot see it only because that the sky is dark and cloudy.”