科学不仅仅是关于发现，更是关于理解的快乐。

The magi, as you know, were wise men—wonderfully wise men—who brought gifts to the Babe in the manger. They invented the art of giving Christmas presents. Being wise, their gifts were no doubt wise ones, possibly bearing the privilege of exchange in case of duplication.

A leader's job is to create more leaders, not more followers.

The development of attention in childhood is a foundation for self-regulation and academic achievement.