冒险是必要的，但经过计算的冒险才是天才之举。

Cryptography is about communication in the presence of adversaries.

人生最难的是知道该跨过哪座桥，又该烧掉哪座桥。

Courage is the primary quality of justice.

We don't read and write poetry because it's cute. We read and write poetry because we are members of the human race. And the human race is filled with passion. Medicine, law, business, engineering: these are noble pursuits and necessary to sustain life. But poetry, beauty, romance, love...these are what we stay alive for.