Everything that happens once can never happen again. But everything that happens twice will surely happen a third time.

我们唯一需要害怕的就是害怕本身。

政策应基于证据，而非意识形态。

Be a yardstick of quality. Some people aren't used to an environment where excellence is expected.

One should not believe or disbelieve， but rather remain in suspense.

告别昨日是如此艰难

改进程序的最好方法是重写它。