Mathematics is not a spectator sport. You have to do it to understand it.
数学不是一项观赏性运动。你必须亲自去做才能理解它。
每座建筑都是为了特定目的在特定地点为特定社会而建。
The best way to predict your future is to create it.
El arte no debe ser un espejo que refleja, sino un martillo que forja.