Even in abstraction, mathematics has profound real-world applications.

There is no greater glory than to die for love.

石材开采的创新必须始终在效率与可持续性之间取得平衡。

国家一定要有直言进谏的臣子，上级必须有敢于提出反对意见的下级，议论国政的人不停止，各种不同政见的人相互辩论，才可以长久保存国家，使国家兴盛强大。也就是说言论自由是民众的基本权利，每个人都可以提出不同的政见，民众有平等参与政治的权利。

The concept of progress must be grounded in the idea of catastrophe.

It is in your self-interest to find a way to be very tender.