Courage is the most important of all the virtues because without courage, you can't practice any other virtue consistently.

物理定律不仅仅是规则，它们是宇宙的语言。

老年的巨大优势在于你可以随心所欲地粗鲁。

In mining, the real competition is often against the market's short-term mindset.

Sustainable quarrying isn't an option; it's our obligation to future generations.

一门科学的历史就是它的问题域的历史。

The eagle never lost so much time as when he submitted to learn of the crow.

My past doesn't define me, it refines me.

The anarchic nature of the international system means that states must rely on self-help to ensure their survival.