The only person you should try to be better than is the person you were yesterday.
Language is not just a tool for communication, but also a vessel for thought.
模型的目的是足够简单以便理解和使用,但又足够复杂以捕捉系统的基本特征。
我已经履行了我的职责。我证明了庞加莱猜想,我在数学上没有什么可做的了。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.