《明史·列传·卷一百一十四》
皇宫紧闭，帝位崇高，如果不广泛运用耳目观察，怎么能让圣人的圣明普照万里。
天阍邃密，法座崇严，若不广达四聪，何由明照万里？
The imperial palace is tightly sealed, and the throne is lofty. If you do not widely employ the eyes and ears of observers, how can the saintly wisdom of the Sage Emperor shine forth across ten thousand li?