教师必须具有健康的体魄，农人的身手，科学的头脑，艺术的兴味，改革社会的精神。

 One foul sentence does more hurt than many foul examples. For these do but corrupt the stream；the other corrupt the fountain.

沉默是快乐的最佳使者：如果我能说出有多快乐，那我的快乐就很小了。

Any woman who understands the problems of running a home will be nearer to understanding the problems of running a country.

The beauty of mathematics only shows itself to more patient followers.

The more uncertain and insecure I feel, the more I cling to the idea of painting.