《论衡·卷四·变虚篇》
假使天是实体，耳朵离地面太远就不能听见人说话。假使天是气，气同云彩烟雾，怎么能听得懂人的话！
使天体乎，耳高不能闻人言；使天气乎，气若云烟，安能听人辞？
If Heaven were a material form, being so far from the ground that its ears could not hear the sounds of Man. If Heaven were a vapor, a vapor is like smoke and cloud, how could it hear the sounds of Man!