To be free is not merely to cast off one's chains, but to live in a way that respects and enhances the freedom of others.

活着就是为了改变世界，难道还有其他原因吗？

伟大的事情总是简单，最伟大的事情只有一个词：自游，正义，荣誉，责任，仁慈，希望。

思想之流，意识之流，总是在流动。

I have always been alone, but I have never been lonely.

Give me a dozen healthy infants, well-formed, and my own specified world to bring them up in and I'll guarantee to take any one at random and train him to become any type of specialist I might select—doctor, lawyer, artist, merchant-chief and, yes, even beggar-man and thief, regardless of his talents, penchants, tendencies, abilities, vocations, and race of his ancestors.

我们都是记忆的总和，然而我们记得的却如此之少。