It's not about how hard you hit. It's about how hard you can get hit and keep moving forward.

Children have real understanding only of that which they invent themselves, and each time that we try to teach them something too quickly, we keep them from reinventing it themselves.

The most important single aspect of software development is to be clear about what you are trying to build.

行为主义者放在自己面前的规则或衡量标准总是：我能否用"刺激和反应"来描述我所看到的这一行为？

现在如果送给别人很少的东西，却希望人家回报很多的东西，那么，人们就会怕你再送东西给自己了。 

The artist must be a shadow of the eternal.