The most important principle of positive psychology is that other people matter.

Innovation is not just about new ideas, but about making them work.

想要行善的人在门外敲著门；爱人的，看见门是敞开的。

Je suis le saint, en prière sur la terrasse...

Randomized evaluations can help us understand what works and what doesn't in development.

The simplest solutions are often the most elegant.