我一直在想某个地方的河流，水流非常快。水里有两个人，试图紧紧抓住对方，但最终水流太强了，他们不得不放手，随波逐流。

The ultimate goal of computer science is to create systems that are both powerful and reliable.

Freedom does not consist in any dreamt-of independence from natural laws, but in the knowledge of these laws, and in the possibility this gives of systematically making them work towards definite ends.

可持续性不仅仅是种树，而是在正确的地方为了正确的理由种正确的树。