The beauty of a building lies in its performance, not in its appearance.

"You can't go back and change the beginning, but you can start where you are and change the ending."

Poverty is not just a lack of money; it is the absence of viable choices.

实际发展水平与潜在发展水平之间的距离，前者由独立解决问题决定，后者由在成人指导下或与更有能力的同伴合作解决问题决定。

I'm not interested in competing with anyone. I hope we all make it.

最深刻的发现往往始于简单的观察。