Remember, if you ever need a helping hand, you'll find them at the end of each of your arms. As you grow older, you will discover that you have two hands, one for helping yourself, the other for helping others.

要理解行为，我们必须从生存和适应的背景中审视其目的。

I don’t let setbacks define me.

物种和系统的多样性不是复杂，而是保险。