一个国家的力量源于其田地的肥沃和农民的智慧。#

So given a Time Turner, I would tell my 21-year-old self that personal happiness lies in knowing that life is not a check-list of acquisition or achievement. Your qualifications, your CV, are not your life, though you will meet many people of my age and older who confuse the two. Life is difficult, and complicated, and beyond anyone’s total control, and the humility to know that will enable you to survive its vicissitudes.

不信你短短观察几天，就不如初次的印象好了。

The most important thing in mathematics is to understand the concepts, not just to memorize formulas.

音乐本应鼓舞人心。