《论衡·卷十一·说日篇》
如今观察日食，太阳西边光亮被遮，过会儿就恢复了光亮；西边恢复了光亮，月亮又移过去遮住了东边，这样西边恢复了光亮，这怎么能说成是日月相重迭遮掩呢？儒者认为日月的形体都非常圆。
今察日之食，西崖光缺，其复也，西崖光复，过掩东崖复西崖，谓之合袭相掩障，如何？儒者谓： 日月之体皆至圆 。
However, when we observe solar eclipses, the light from the west side of the sun is eclipsed, and after some time, its light is restored; once the west side has become bright again, the moon moves across and eclipses the east side. How can we possibly say that this is due to the overlapping of the sun and the moon? The Confucians all believed that the sun and the moon are perfectly round.