There is no despair so absolute as that which comes with the first moments of our first great sorrow, when we have not yet known what it is to have suffered and be healed, to have despaired and have recovered.

学习数学的最好方法就是去做数学。

世界因你的榜样而改变，而不是因你的观点而改变。

爱和艺术是灵魂飞向天堂的两只翅膀。