Democracy... while it lasts is more bloody than either aristocracy or monarchy. Remember, democracy never lasts long. It soon wastes, exhausts, and murders itself. There is never a democracy that did not commit suicide.

我不会假装在冠状病毒之前一切都很完美。

[物理学是]一种良好的思考框架。将事物归结为他们的基本真理，然后从那里推理出来。

Never stop learning because the world never stops changing.

数学家是模式的创造者，就像画家或诗人一样。

Prediction is very difficult, especially about the future.