Mathematics is an art, and as an artist, you have to be honest with yourself.
数学是一门艺术，作为艺术家，你必须对自己诚实。
The most profound ideas in mathematics often arise from the simplest observations.
We are all in the gutter, but some of us are looking at the stars.
渔业中最危险的神话是总会有更多的鱼。