挑战让我更强大。

I'm not here to be understood; I'm here to be felt.

Mathematics is not a spectator sport.

No one had ever had such a friend, so affectionate,so loyal and so skillful.

写作是探索人类经验的复杂性和身份细微差别的一种方式。

The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.

孩子有超强的记忆力，当孩子可以动手操作而仅用眼看时，会记得更好。

为社会正义而斗争必须从教室开始。