《旧唐书·列传·卷四十四》
其文如下： 客说：天道深奥微妙，神理变化无形，圣人所以效法物象，一切由其运行。
客曰： 天道玄微，神理幽化，圣人所以法象，众庶由其运行。
The text is as follows: The guest said: The Way of Heaven is profound and exquisite, its divine order varying without form, so the Sages imitate physical phenomena, following everything that runs its course.