优化是在给定约束条件下做出最佳决策的艺术。
相信自己的想法,即使没有其他人相信。
有两样东西,人们越是经常持久地对之凝神思索,它们就越是使内心充满常新而日增的惊奇和敬畏:我头上的星空和我心中的道德律。
In a rapidly changing market, the only constant is customer needs.
The city is like a great palimpsest, a manuscript that has been written and rewritten over the centuries.