数学的美在于它既精确又富有创造性。
我步入丛林，因为我希望生活有意义，我希望活得深刻，吸取生命中所有精华，把非生命的一切都击溃，以免当我生命终结，发现自己从没有活过。
——在北京蒙藏统一政治改良会欢迎会的演说，1912年9月1日
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.
Mathematics is the art of asking the right questions and then finding their answers.
The pursuit of equality requires both individual courage and collective action.
