持续改进不是目的地，而是一场永无止境的旅程。

"Memory is a strange thing, it doesn't work like I thought it did. We are so used to thinking of it as a camera or a tape recorder, but it's not like that at all. It's more like a painter, who adds and subtracts elements according to his own rules."

质量是免费的。它不是礼物，但它是免费的。花钱的是那些不质量的东西——所有那些没有第一次就把工作做好的行为。

历史学家的任务是让死者重生。

《关睢》这首诗，快乐而不过分，哀婉而不伤恸。

To be a good mathematician, you need to have both intuition and rigor.