It's not about being the best, it's about being better than you were yesterday.

"If you want to fly, you have to give up what weighs you down."

知识的最大敌人不是无知，而是知识的幻觉。

Sustainability isn't a cost center - it's the ultimate competitive advantage.

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

写作的行为是一种乐观的行为。如果你觉得它不重要，你就不会费心去做。