生活的意义不在于你拥有多少，而在于你如何面对失去。
The meaning of life is not in how much you have, but in how you face loss.
解释：不可以不知道活着的乐趣，也不可以不知道虚度光阴的担忧。
每一本书都是一次旅程，每一次旅程都是一本书。
We cannot be sure of having something to live for unless we are willing to die for it.
言论自由是自由的重要堡垒；它们共同繁荣和共同消亡。
Making something variable is easy. Controlling duration of constancy is the trick.
The danger of the past was that men became slaves. The danger of the future is that men may become robots.