不要为未来担忧，不要为过去哭泣。

Rigor in proof is what separates mathematics from all other sciences.

We believe that architecture should speak of its time and place, but yearn for timelessness.

心与物的区分仅适用于由感觉内容构成的逻辑构造。

学习的挑战不仅在于记忆，还在于从具体例子中归纳出更广泛的概念。