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。
Randomized evaluations can help us understand what works and what doesn't in development.
古往今来的平庸之人，都是因为懒惰而失败；古往今来的有才之人，都是因为骄傲而失败。
The most important property of a program is whether it accomplishes the intention of its user.
当我们被爱时，我们都会变得更好。
快乐的最好方式是让别人快乐。
There is no such thing as a special category of science called applied science; there is science and its applications, which are related to one another as the fruit is related to the tree that has borne it.