"Parental investment is the key to understanding the origins of sex differences."

Happiness is a gift and the trick is not to expect it, but to delight in it when it comes.

The hardest single part of building a software system is deciding precisely what to build.

Profitability and environmental responsibility must go hand in hand—there is no other way.

做出伟大工作的唯一途径就是热爱你所做的事。