"The human heart, at whatever age, opens only to the heart that opens in return."

"Pressure is a privilege—it means you have an opportunity to do something great."

Do the right thing, not the easy thing.

The United States is the most powerful country in the world, and it will remain so for the foreseeable future.

当今煤炭行业的挑战需要大胆的领导力和远见。

Philosophy is a battle against the bewitchment of our intelligence by means of language.

"In the darkest times, even the smallest acts of kindness can shine like stars."

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。