You must be filled with expectancy. You must be awash in hope.

All men are immortal， but those who are not educated are immortal in a lower and less enviable sense.

I don’t think about failure.

领导力不是掌权，而是照顾你负责的人。

在科学领域，每一个被回答的问题都会引出十几个等待探索的新问题。

每个孩子都应该在他们读的故事中看到自己。

在深冬里，我终于明白，在我内心深处有一个不可战胜的夏天。