《论衡·卷三·偶会篇》
这并非上天安排日出干活，安排晚上休息，而是干活要与日出相一致，休息要与夜晚相一致的缘故。
非天以日作之，以液息之也，作与日相应，息与夜相得也。
It is not that God arranges for the sunrise to work and the night to rest, but that the work must be in line with the sunrise, and the rest must be in line with the night.