The most important political development of the last half century has been the spread of liberal democracy around the world.

采矿业是周期性的，但伟大的公司是由那些既能驾驭低迷期又能驾驭繁荣期的人建立的。

我不是完美主义者，但我喜欢把事情做好。

The truth is not always the best answer, but it is the only one that can set you free.

你越爱自己，就越能给予他人爱。