Day 2 companies make high-quality decisions, but they make high-quality decisions slowly. To keep the energy and dynamism of Day 1, you have to somehow make high-quality, high-velocity decisions.

In the end, we are all alone. But that loneliness is what connects us all.

The evening’s the best part of the day. You’ve done your day’s work. Now you can put your feet up and enjoy it.

The only limit to our realization of tomorrow is our doubts of today.

For in the final analysis, our most basic common link is that we all inhabit this small planet. We all breathe the same air. We all cherish our children's futures. And we are all mortal.

柠檬问题是指买家无法确定产品质量，因此只愿意支付反映平均质量的价格。