一个好的数学家是懒惰的,但要以建设性的方式。
A good mathematician is lazy, but in a constructive way.
文学是在非人的世界中保持我们人性的火焰。
The elements are the alphabet of nature, and we are learning to read.
To be free is not merely to cast off one's chains, but to live in a way that respects and enhances the freedom of others.