The existence of the natural world is the same kind of fact as the existence of any proposition.

【释义】国家最重大的事情，在于祭祀与战争。

过去总是紧张的，未来是完美的。

I think it's very important to have a feedback loop, where you're constantly thinking about what you've done and how you could be doing it better.

There is one small step for man, a giant leap for mankind.