The worst evils in history have always been committed by those who truly believed they were combating evil. Beware of combating evil.

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.

Some programming languages manage to absorb change, but withstand progress.

快乐的最好方式是让别人快乐。

我们都是相互联系的；在生物学上彼此相连。在化学上与地球相连。在原子层面上与宇宙的其他部分相连。

The capacity of the human mind for formulating and solving complex problems is very small compared with the size of the problems whose solution is required for objectively rational behavior in the real world.

过去是跟随我们的影子，但未来是引导我们的光。