A good mathematician should be both rigorous and imaginative.
优秀的数学家应该既严谨又富有想象力。
预测未来的最好方法就是去创造它。
The past is a shadow that follows us, a ghost that haunts us.
A arte de escrever é a arte de descobrir a si mesmo.
To be human is to be guilty.
那双曾经属于我的珍贵的手。