我失败了很多次，这就是我成功的原因。

Writing is a way of bearing witness.

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。

The more you know who you are, and what you want, the less you let things upset you.

A proposition is an assertion that something is or is not the case.

对于已经发生的事，感谢它；对于将要发生的事，说“是”！