We were talking about this later at home, because I had this sense that striking as what Mina says is, holding up the two statements as mutually incompatible, obvious as it seems, wasn't quite the whole story. I mean, that one could argue for situations in which you might hear both from a person without that person being a hypocrite or clueless. I think what I ended up with is that books have the capacity to change the world, but not all books aim that high, and sometimes you can have something--I would argue--that's written only to be light, in-the-moment entertainment. Mina I think would say that even such a book has weight and import, and i agree with that in the sense that if you fill your head with fluff, then all you have in your head is fluff, but I think that a book that merely fills your head with fluff might be dismissible as only a book--without invalidating the statement that books can change the world.