The world loved man when he smiled. The world became afraid of him when he laughed.

The quality of an organization's sustainability determines the quality of its legacy.

连人都不能很好地事奉，还怎么能事奉鬼呢？

数学是为数学家而写的。

永远不要低估坚持的力量。大多数人放弃得太早。

教师必须为形成较好人类而献出一切。