仰以观于天文,俯以察于地理,是故知幽明之故。
翻译:仰观天上日月星辰,俯察地面山川原野,因此能够知晓幽隐和显明的各种事理。
自由社会的原则对于人类进步和繁荣至关重要。
The question of technology is the question of the constellation of truth and untruth in which we live.