最后，心理学把大部分关于快乐和美好生活的书都留给了哲学，哲学则理所当然地任凭那些书落满了灰尘。
In the end, psychology left most of the volumes on happiness and the good life with philosophy, which dutifully left them to gather dust.
如果商品是内容本身，那为什么那些书、音乐和电影的价格总是取决于承载的介质呢？
If the content was what they were selling, why has the price of books or music or movies always depended mostly on the format?
就像音乐和视频可以提供下载版本，书也可以。
Just as music and videos could be offered with the option of buying a downloadable version, so too could books.
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