If you're not failing every now and then, you're not doing anything very innovative.

I'm not a day, I'm a night.

"Every word knows something of a vicious circle."

最伟大的领导者不一定是做最伟大事情的人，而是让人民做最伟大事情的人。

The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.

We are all given one thing by which our lives are measured, one determination.

我们在童年时读的书是塑造我们灵魂的书。