停在港口的船是安全的，但那不是造船的目的。
A ship in port is safe, but that's not what ships are built for.
Concerning the gods, I cannot know either that they exist or that they do not exist, nor what form they might have, for there is much to prevent one's knowing: the obscurity of the subject and the shortness of man's life.
Safety isn't just a policy; it's a culture we must live every day.
一个理智的人在一个疯狂的社会里必须显得疯狂。