Sometimes, the only way to stay sane is to go a little crazy.

The challenge in science is not just to find answers but to understand their deeper implications.

The only way to achieve the impossible is to believe it is possible.

学得越多，知道得越多。知道得越多，忘得越多。忘得越多，知道得越少。那何必学习呢？

优秀的数学家不是知道所有答案的人，而是能提出正确问题的人。