The search for reciprocity laws is a fundamental theme in the history of mathematics.

True understanding comes from seeing connections between seemingly unrelated ideas.

看遍了世间的人情冷暖，才认识到旷达洒脱的可贵；尝遍了世间的种种滋味，才知道清净淡泊的真切内涵。

孤独是与自己面对面的时间。