The best way to learn mathematics is to do mathematics.
逆向思考往往能带来意想不到的好处。
The world is not a puzzle to be solved, but a mystery to be lived.
世界如此不快乐是因为它对真实的自我无知。人的真正本性是幸福的。幸福是与生俱来的在真实的自我中。人对幸福的追求是对他真实自我的无意识的追求。
Quality is never an accident; it is always the result of intelligent effort.