The first sentence of the novel is the most important, but the last sentence is the one that stays with you.

The great challenge of our time is to create a world order that is both just and sustainable.

城市冰冷而空旷，没人在周围评判我。

幸福的秘诀是：尽量扩大你的兴趣范围，对感兴趣的人和物尽可能友善。