Quality is remembered long after price is forgotten.
The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
"Writing is a way of talking without being interrupted."
语言不仅仅是交流的工具；它是一种看待世界的方式。
The essence of mathematics lies in its freedom.