It's not worth doing something unless someone, somewhere, would much rather you weren't doing it.

The chief beauty about time is that you cannot waste it in advance. The next year, the next day, the next hour are lying ready for you, as perfect, as unspoiled, as if you had never wasted or misapplied a single moment in all your life.

The friend who holds your hand and says the wrong thing is made of dearer stuff than the one who stays away.

世界上没有像大城市那样的孤独。

Every algorithm tells a story, not just of its own steps, but of the problem it seeks to solve.

People who are really serious about software should make their own hardware.