世界上最伟大的事情是知道如何属于自己。
——署名公告〈关于实行党纪的命令〉,提醒党员遵守党纪,1924年3月18日
有时最简单的旋律反而最有力量。
Cryptography is about communication in the presence of adversaries.
The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.