卡塞尔文献展必须始终是一个问题，而不是一个答案。

The challenge is to make buildings that are both functional and poetic.

The chemical industry is the backbone of modern civilization, and we must treat it with the respect and responsibility it deserves.

礼义廉耻，可以用来要求自己，不可用来要求别人。要求自己则能少犯过失，要求别人则难以与人和睦相处，难以与他人相处就不合乎处世之道。所以君子只严格要求自己，小人则对别人求全责备。

In science, the only constant is change.