I don't believe in pessimism. If something doesn't come up the way you want, forge ahead. If you think it's going to rain, it will.

The best way to predict the future is to invent it.

你唯一应该努力超越的人就是昨天的自己。

数学不知道种族或地理边界；对于数学来说，文化世界是一个国家。