格瓦拉第二次漫游南美前对母亲说

The desires， and other passions of man， in themselves， are in his own power； his real difficulties are， to know when they are to be controlled， and when not.

我只是想改变世界，一次一颗亮片地改变。

一本书是一个相遇的地方，一个共享的想象空间。