A good mathematician is someone who can see analogies between theorems. A great mathematician is someone who can see analogies between analogies.

I don't think about the past. The only thing that matters is the future.

民主就是指人民用人民的大头棒打击人民。

数学是模式的科学，我们研究它们以学习如何逻辑地、批判地和创造性地思考。