I don’t run out of material. I run out of time.

智慧属于对永恒事物的智性理解；知识则属于对临时事物的理性理解。

随机评估可以帮助我们了解发展中哪些措施有效，哪些无效。

He who wants to do good knocks at the gate； he who loves finds the gate open。