我不是天使，我是恶魔。

Leadership is about inspiring others to see the potential within themselves.

我们需要的书是那些能读懂我们的书。

Mathematics is the most beautiful and most powerful creation of the human spirit.

The great cause of the prosperity of the country is liberty—liberty in the economic system.

我一生都是一个自私的人，虽然原则上并非如此，但行动上却是。