生命中最美好的东西都是免费的。显然，我们最宝贵的资源是时间。
My favorite things in life don't cost any money. It's really clear that the most precious resource we all have is time.
做好准备。当你完成任何大型项目（房子、电影、活动、App）的90%时，其余无数的细节将需要第二个90%来完成。
We are all haunted by something, whether we admit it or not.
The only wisdom we can hope to acquire is the wisdom of humility: humility is endless.