The spread of liberal democracy around the world is not inevitable, but it is the most likely outcome given the alternatives.

Failure is the best teacher. You learn by making mistakes and figuring out how to correct them.

我不会花时间高谈阔论那些高概念的东西；我花时间解决工程和制造问题。

"The best stories are the ones that come from the heart."

物理理论的美不仅在于其数学的优雅，还在于其解释和预测现象的能力。