城市是其人民的集体记忆，与记忆一样，它与物体和地方相关联。
The city is the collective memory of its people, and like memory it is associated with objects and places.
认为未来不可预测的观点每天都在被我们轻易解释过去的事实所削弱。
数学家的工作永远不会完成；总有新的问题需要探索，新的谜团需要揭开。
There is no truth. There is only perception.
数学中发现的快乐是无与伦比的。