The biggest risk is not taking any risk. In a world that's changing quickly, the only strategy that is guaranteed to fail is not taking risks.

We should weep for men at their birth， not at their death.

京东的成功来自于对用户体验的极致追求。

Education does not take root in the soul unless it goes deep.

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。