The anarchic nature of the international system compels states to prioritize their own survival above all else.

Leadership is about making tough decisions and standing by them.

The best ideas often come from those closest to the problem.

Mining with integrity means leaving the land better than we found it.

The only way to learn mathematics is to do mathematics.

The first lesson of economics is scarcity: There is never enough of anything to satisfy all those who want it. The first lesson of politics is to disregard the first lesson of economics.

纠正一个错误与建立一个新的真理或事实同样有益，有时甚至更好。