Theorems are the permanent literature of mathematics.

在量子力学的领域里，观察者和被观察者密不可分，这对我们关于现实的经典观念提出了挑战。

You can't have the good without the bad. So I just take the bad with the good and move on.

When I look at the world I'm pessimistic, but when I look at people I am optimistic.

【译文】不要轻信那些所谓特别正直的人，也要防备那些标榜仁义却不仁义的人。山里有长得笔直的树，世上却无正直的人。

"The only thing that is truly yours is your time."

I'm not a present, I'm a gift.

我认为对生活有幽默感很重要。