Prediction is very difficult, especially about the future.

唯一真正安全的系统是关闭的，浇筑在混凝土块中，并密封在有武装警卫的铅衬房间中——即便如此，我仍有疑虑。

The most significant threat to liberal democracy today is not from the outside, but from within.

制造链式反应堆的基本点是正确安排材料。

We all want to be told stories, and we all want to tell stories. It's one of the things that makes us human.

人声是最美的乐器，也是最难演奏的乐器。

帮助人们的最佳方式是给予他们选择的自由，同时温和地引导他们走向正确的方向。

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