The human brain consists of many specialized circuits that evolved to solve specific problems our ancestors faced during our evolutionary history.

Evolution is not just a theory; it's a fact written in our genes.

We say of some things that they can't be forgiven, or that we will never forgive ourselves. But we do—we do it all the time.

虽然在一切的成长物中，爱情看上去是最快的，究其实却最迟缓。男男女女没有一个人晓得什么是十全十潜的爱，除非一直到他们结婚了二十五年之后。

人力资本是任何国家最重要的资产。