你画的每一笔都应该有目的，即使只是为了让人微笑。
Every line you draw should have a purpose, even if it's just to make someone smile.
我们不会给你写分手情歌
The Erdős discrepancy problem fascinated me because it was so simple to state yet so deep in its implications.
数学不仅仅是关于数字，而是关于模式、结构和关系。