自由不仅仅是随心所欲的机会；也不仅仅是在既定选项之间选择的机会。自由首先是制定可用选择的机会，对它们进行辩论——然后，是选择的机会。

I’m convinced that about half of what separates the successful entrepreneurs from the non-successful ones is pure perseverance.

我既不肯定也不否定，而是暂时保持怀疑。

我相信只要你付出努力，结果自然会来。

Never stop learning; the day you think you know it all is the day you start falling behind.

Sustainability is not an option; it's a necessity for the future of mining.

Dealing with failure is easy: Work hard to improve. Success is also easy to handle: You've solved the wrong problem. Work hard to improve.