数学不仅仅是抽象理论的集合，而是描述宇宙的语言。
Mathematics is not just a collection of abstract theories, but a language that describes the universe.
Boundaries define us. They define what is me and what is not me. A boundary shows me where I end and someone else begins, leading me to a sense of ownership.
The only way to learn mathematics is to do mathematics.
The past is a foreign country; they do things differently there.
The market will do what it has to do to prove the majority wrong.
