The beauty of mathematics is that it is one of the few areas of human endeavor where absolute truth can be known.

——在上海中国国民党本部会议演说，1920年11月9日

出生的那一刻是我们失去最多的时候。

引用自余华

I never guess. It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.

不论你怎么看待历史，历史都会在你身上留下痕迹。