The only meaningful way to study learning is through objective measurement.

"Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers."

我喜欢梦的逻辑。

你必须相信你的长期计划，但你需要短期目标来激励和启发你。

穷人面临的约束往往是政策制定者看不到的。

老年最好的盔甲就是追求完美、没有虚度的一生。