It is true that liberty is precious; so precious that it must be carefully rationed.
自由确实珍贵；如此珍贵以至于必须谨慎配给。
Economics is ultimately about improving human welfare.
To live under the American Constitution is the greatest political privilege that was ever accorded to the human race.
The past is a source of knowledge, and the future is a source of hope. Love of the past implies faith in the future.
The best mining companies don't just follow regulations—they help shape them.
缓慢的程度与记忆的强度成正比。速度的程度与遗忘的强度成正比。
I never think of myself as an icon. What is in other people's minds is not in my mind. I just do my thing.
发现的关键不仅在于我们找到的答案，还在于我们敢于提出的问题。