可持续性不是一种选择，而是我们对后代的责任。

You have to believe in the impossible.

The minimum content of natural law is necessary for any legal system.

艺术是过去与现在之间的对话。

数学研究是一场没有终点的旅程。

The great and chief end, therefore, of men's uniting into commonwealths and putting themselves under government is the preservation of their property.

Is there any relief from some of thesepressures that I've been outlining? I think there is. I just want to turn to afew of them. Let's take meritocracy. This idea that everybody deserves to getwhere they get to, I think it's a crazy idea, completely crazy. I will support any politician of Left and Right, with any halfway-decent meritocratic idea; I am a meritocrat in that sense. But I think it's insane to believe that we will ever make a society that is genuinely meritocratic; it's an impossible dream.

I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.

可持续发展不仅仅是一个流行词，它是负责任的林业的基础。

The psychologist must be a meticulous observer.