死者并非无力。死亡，并非无力。

You are the artist of your own life. Don't hand the paintbrush to anyone else.

书籍是最安静、最恒久的朋友；它们是最易接近、最睿智的顾问，也是最耐心的老师。

Never stop learning—the moment you think you know everything is the moment you fall behind.

数学中最激动人心的时刻是当你看到以前似乎不相关的事物之间的联系时。