数学家的模式，就像画家或诗人的模式一样，必须是美丽的；思想，就像颜色或文字一样，必须以和谐的方式结合在一起。
The mathematician's patterns, like the painter's or the poet's, must be beautiful; the ideas, like the colors or the words, must fit together in a harmonious way.
The truth is, we all have our own version of reality, and sometimes it's hard to reconcile the two.
A well-run quarry is a symphony of precision, safety, and respect.《The Quarry Master's Manual》
The past is never dead. It's not even past.
