The world is not a problem to be solved; it is a living being to which we belong.
真正的教师是能够立即站在孩子立场上的人。
对一项神圣事业的信仰相当程度上替代了已经失去的自信。
Cryptography is the art of transforming information into a form that is unintelligible to anyone who does not possess the key to unlock it.