指事物之间相互依存、相互制约的关系。

I strongly believe that missionaries make better products. They care more. For a missionary， it's not just about the business. There has to be a business， and the business has to make sense， but that's not why you do it. You do it because you have something meaningful that motivates you.

The bigger the brain, the more complex the social world it can manage.

Leadership is about making tough decisions and standing by them, even when they are unpopular.

如果你用行为主义的方式养育孩子，让他们无所畏惧，世界就会改变。