你不必亲自去尿电网，才能学会不这么做。
You don’t have to pee on an electric fence to learn not to do it.
The unity of mathematics is not imposed but discovered.
Every breakthrough is at first laughable and ridiculous. In fact if it did not start out laughable and ridiculous， it is not a breakthrough.
In mathematics, the journey of discovery is as important as the destination.
我不是政治家，我是演员。我不必对每件事都有意见。