The only time you fail is when you stop trying.
唯一失败的时候就是你停止尝试的时候。
Leadership means making tough decisions today that will pay off decades from now.
强调历史研究既要理解历史背景,又要保持学术批判性。
密码学的目标是使破解系统的成本超过受保护信息的价值。