幸福的秘诀是自由，而自由的秘诀是勇气。

The only thing you absolutely have to know is the location of the library.

"The unexamined life is not worth living."

The fabric of reality is woven with the threads of mathematics and observation.

我不让过去定义我，我让它磨砺我。

历史学家的任务是复活那些被时间湮没的声音。