数学之美不在于其复杂性，而在于其简洁性以及它揭示隐藏真理的方式。

The man with a toothache thinks everyone happy whose teeth are sound. The poverty-stricken man makes the same mistake about the rich.

The best films are the ones that challenge you.

实现明天理想的唯一障碍是今天的疑虑。

追求完美是优秀的敌人。